java.lang.Object
- org.eclipse.collections.impl.AbstractRichIterable<T>
- - org.eclipse.collections.impl.collection.immutable.AbstractImmutableCollection<T>
 - - org.eclipse.collections.impl.set.immutable.AbstractImmutableSet<T>
 - - org.eclipse.collections.impl.set.immutable.ImmutableEmptySet<T>

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<T>, java.util.Collection<T>, java.util.Set<T>, ImmutableCollection<T>, InternalIterable<T>, RichIterable<T>, ImmutableSet<T>, ImmutableSetIterable<T>, SetIterable<T>, UnsortedSetIterable<T>
```
final class ImmutableEmptySet<T>
extends AbstractImmutableSet<T>
implements java.io.Serializable
```
This is a zero element ImmutableSet which is created by calling the Sets.immutable.empty() method.

Nested Class Summary
- Nested classes/interfaces inherited from class org.eclipse.collections.impl.set.immutable.AbstractImmutableSet
  AbstractImmutableSet.ImmutableSetIterator

Field Summary

Fields
Modifier and Type Field Description

private static PartitionImmutableSet<?> EMPTY

(package private) static ImmutableSet<?> INSTANCE

private static long serialVersionUID

Constructor Summary

Constructors
Constructor Description

ImmutableEmptySet()

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`boolean`	`allSatisfy(Predicate<? super T> predicate)`	Returns true if the predicate evaluates to true for every element of the iterable or if the iterable is empty.
`<P> boolean`	`allSatisfyWith(Predicate2<? super T,? super P> predicate, P parameter)`	Returns true if the predicate evaluates to true for every element of the collection, or returns false.
`boolean`	`anySatisfy(Predicate<? super T> predicate)`	Returns true if the predicate evaluates to true for any element of the iterable.
`<P> boolean`	`anySatisfyWith(Predicate2<? super T,? super P> predicate, P parameter)`	Returns true if the predicate evaluates to true for any element of the collection, or return false.
`void`	`appendString(java.lang.Appendable appendable)`	Prints a string representation of this collection onto the given `Appendable`.
`void`	`appendString(java.lang.Appendable appendable, java.lang.String separator)`	Prints a string representation of this collection onto the given `Appendable`.
`void`	`appendString(java.lang.Appendable appendable, java.lang.String start, java.lang.String separator, java.lang.String end)`	Prints a string representation of this collection onto the given `Appendable`.
`<V> ImmutableSet<V>`	`collect(Function<? super T,? extends V> function)`	Returns a new collection with the results of applying the specified function on each element of the source collection.
`<V,R extends java.util.Collection<V>> R`	`collect(Function<? super T,? extends V> function, R target)`	Same as `RichIterable.collect(Function)`, except that the results are gathered into the specified `target` collection.
`<V> ImmutableSet<V>`	`collectIf(Predicate<? super T> predicate, Function<? super T,? extends V> function)`	Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate.
`<V,R extends java.util.Collection<V>> R`	`collectIf(Predicate<? super T> predicate, Function<? super T,? extends V> function, R target)`	Same as the collectIf method with two parameters but uses the specified target collection for the results.
`<P,V,R extends java.util.Collection<V>> R`	`collectWith(Function2<? super T,? super P,? extends V> function, P parameter, R target)`	Same as collectWith but with a targetCollection parameter to gather the results.
`boolean`	`contains(java.lang.Object obj)`	Returns true if the iterable has an element which responds true to element.equals(object).
`int`	`count(Predicate<? super T> predicate)`	Return the total number of elements that answer true to the specified predicate.
`<V> ImmutableBag<V>`	`countBy(Function<? super T,? extends V> function)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
`<V,R extends MutableBagIterable<V>> R`	`countBy(Function<? super T,? extends V> function, R target)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
`<V> ImmutableBag<V>`	`countByEach(Function<? super T,? extends java.lang.Iterable<V>> function)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
`<V,R extends MutableBagIterable<V>> R`	`countByEach(Function<? super T,? extends java.lang.Iterable<V>> function, R target)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
`<V,P> ImmutableBag<V>`	`countByWith(Function2<? super T,? super P,? extends V> function, P parameter)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.
`<V,P,R extends MutableBagIterable<V>> R`	`countByWith(Function2<? super T,? super P,? extends V> function, P parameter, R target)`	This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.
`<P> int`	`countWith(Predicate2<? super T,? super P> predicate, P parameter)`	Returns the total number of elements that evaluate to true for the specified predicate.
`T`	`detect(Predicate<? super T> predicate)`	Returns the first element of the iterable for which the predicate evaluates to true or null in the case where no element returns true.
`T`	`detectIfNone(Predicate<? super T> predicate, Function0<? extends T> function)`	Returns the first element of the iterable for which the predicate evaluates to true.
`java.util.Optional<T>`	`detectOptional(Predicate<? super T> predicate)`	Returns the first element of the iterable for which the predicate evaluates to true as an Optional.
`void`	`each(Procedure<? super T> procedure)`	The procedure is executed for each element in the iterable.
`boolean`	`equals(java.lang.Object other)`	Follows the same general contract as `Set.equals(Object)`.
`<V> ImmutableSet<V>`	`flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function)`	`flatCollect` is a special case of `RichIterable.collect(Function)`.
`<V,R extends java.util.Collection<V>> R`	`flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function, R target)`	Same as flatCollect, only the results are collected into the target collection.
`<P> void`	`forEachWith(Procedure2<? super T,? super P> procedure, P parameter)`	The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.
`void`	`forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)`	Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.
`T`	`getFirst()`	Returns the first element of an iterable.
`T`	`getLast()`	Returns the last element of an iterable.
`T`	`getOnly()`	Returns the element if the iterable has exactly one element.
`<V,R extends MutableMultimap<V,T>> R`	`groupBy(Function<? super T,? extends V> function, R target)`	Same as `RichIterable.groupBy(Function)`, except that the results are gathered into the specified `target` multimap.
`<V,R extends MutableMultimap<V,T>> R`	`groupByEach(Function<? super T,? extends java.lang.Iterable<V>> function, R target)`	Same as `RichIterable.groupByEach(Function)`, except that the results are gathered into the specified `target` multimap.
`int`	`hashCode()`	Follows the same general contract as `Set.hashCode()`.
`double`	`injectInto(double injectedValue, DoubleObjectToDoubleFunction<? super T> doubleObjectToDoubleFunction)`	Returns the final double result of evaluating function using each element of the iterable and the previous evaluation result as the parameters.
`int`	`injectInto(int injectedValue, IntObjectToIntFunction<? super T> intObjectToIntFunction)`	Returns the final int result of evaluating function using each element of the iterable and the previous evaluation result as the parameters.
`long`	`injectInto(long injectedValue, LongObjectToLongFunction<? super T> longObjectToLongFunction)`	Returns the final long result of evaluating function using each element of the iterable and the previous evaluation result as the parameters.
`<IV> IV`	`injectInto(IV injectedValue, Function2<? super IV,? super T,? extends IV> function)`	Returns the final result of evaluating function using each element of the iterable and the previous evaluation result as the parameters.
`boolean`	`isEmpty()`	Returns true if this iterable has zero items.
`java.util.Iterator<T>`	`iterator()`
`java.lang.String`	`makeString()`	Returns a string representation of this collection by delegating to `RichIterable.makeString(String)` and defaulting the separator parameter to the characters `", "` (comma and space).
`java.lang.String`	`makeString(java.lang.String separator)`	Returns a string representation of this collection by delegating to `RichIterable.makeString(String, String, String)` and defaulting the start and end parameters to `""` (the empty String).
`java.lang.String`	`makeString(java.lang.String start, java.lang.String separator, java.lang.String end)`	Returns a string representation of this collection with the elements separated by the specified separator and enclosed between the start and end strings.
`T`	`max()`	Returns the maximum element out of this container based on the natural order.
`T`	`max(java.util.Comparator<? super T> comparator)`	Returns the maximum element out of this container based on the comparator.
`<V extends java.lang.Comparable<? super V>> T`	`maxBy(Function<? super T,? extends V> function)`	Returns the maximum elements out of this container based on the natural order of the attribute returned by Function.
`T`	`min()`	Returns the minimum element out of this container based on the natural order.
`T`	`min(java.util.Comparator<? super T> comparator)`	Returns the minimum element out of this container based on the comparator.
`<V extends java.lang.Comparable<? super V>> T`	`minBy(Function<? super T,? extends V> function)`	Returns the minimum elements out of this container based on the natural order of the attribute returned by Function.
`ImmutableSet<T>`	`newWith(T element)`	This method is similar to the `with` method in `MutableCollection` with the difference that a new copy of this collection with the element appended will be returned.
`ImmutableSet<T>`	`newWithAll(java.lang.Iterable<? extends T> elements)`	This method is similar to the `withAll` method in `MutableCollection` with the difference that a new copy of this collection with the elements appended will be returned.
`ImmutableSet<T>`	`newWithout(T element)`	This method is similar to the `without` method in `MutableCollection` with the difference that a new copy of this collection with the element removed will be returned.
`ImmutableSet<T>`	`newWithoutAll(java.lang.Iterable<? extends T> elements)`	This method is similar to the `withoutAll` method in `MutableCollection` with the difference that a new copy of this collection with the elements removed will be returned.
`boolean`	`noneSatisfy(Predicate<? super T> predicate)`	Returns true if the predicate evaluates to false for every element of the iterable or if the iterable is empty.
`<P> boolean`	`noneSatisfyWith(Predicate2<? super T,? super P> predicate, P parameter)`	Returns true if the predicate evaluates to false for every element of the collection, or return false.
`boolean`	`notEmpty()`	The English equivalent of !this.isEmpty()
`PartitionImmutableSet<T>`	`partition(Predicate<? super T> predicate)`	Filters a collection into a PartitionedIterable based on the evaluation of the predicate.
`ImmutableSet<T>`	`reject(Predicate<? super T> predicate)`	Returns all elements of the source collection that return false when evaluating of the predicate.
`<R extends java.util.Collection<T>> R`	`reject(Predicate<? super T> predicate, R target)`	Same as the reject method with one parameter but uses the specified target collection for the results.
`<P,R extends java.util.Collection<T>> R`	`rejectWith(Predicate2<? super T,? super P> predicate, P parameter, R target)`	Similar to `RichIterable.reject(Predicate, Collection)`, except with an evaluation parameter for the second generic argument in `Predicate2`.
`ImmutableSet<T>`	`select(Predicate<? super T> predicate)`	Returns all elements of the source collection that return true when evaluating the predicate.
`<R extends java.util.Collection<T>> R`	`select(Predicate<? super T> predicate, R target)`	Same as the select method with one parameter but uses the specified target collection for the results.
`<P,R extends java.util.Collection<T>> R`	`selectWith(Predicate2<? super T,? super P> predicate, P parameter, R target)`	Similar to `RichIterable.select(Predicate, Collection)`, except with an evaluation parameter for the second generic argument in `Predicate2`.
`int`	`size()`	Returns the number of items in this iterable.
`ImmutableSet<T>`	`tap(Procedure<? super T> procedure)`	Executes the Procedure for each element in the iterable and returns `this`.
`java.lang.String`	`toString()`	Returns a string with the elements of the iterable separated by commas with spaces and enclosed in square brackets.
`private java.lang.Object`	`writeReplace()`
`<S> ImmutableSet<Pair<T,S>>`	`zip(java.lang.Iterable<S> that)`	Deprecated. in 6.0.
`<S,R extends java.util.Collection<Pair<T,S>>> R`	`zip(java.lang.Iterable<S> that, R target)`	Same as `RichIterable.zip(Iterable)` but uses `target` for output.
`ImmutableSet<Pair<T,java.lang.Integer>>`	`zipWithIndex()`	Deprecated. in 6.0.
`<R extends java.util.Collection<Pair<T,java.lang.Integer>>> R`	`zipWithIndex(R target)`	Same as `RichIterable.zipWithIndex()` but uses `target` for output.

Methods inherited from class org.eclipse.collections.impl.set.immutable.AbstractImmutableSet
asParallel, cartesianProduct, castToSet, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectInt, collectLong, collectShort, collectWith, difference, differenceInto, groupBy, groupByEach, intersect, intersectInto, isProperSubsetOf, isSubsetOf, newMutable, nullSafeHashCode, partitionWith, powerSet, rejectWith, selectInstancesOf, selectWith, symmetricDifference, symmetricDifferenceInto, toImmutable, union, unionInto

Methods inherited from class org.eclipse.collections.impl.collection.immutable.AbstractImmutableCollection
add, addAll, castToCollection, chunk, clear, groupByUniqueKey, parallelStream, reduce, remove, removeAll, removeAllFrom, retainAll, spliterator, stream, sumByDouble, sumByFloat, sumByInt, sumByLong, toArray, toArray

Methods inherited from class org.eclipse.collections.impl.AbstractRichIterable
asLazy, containsAll, containsAllArguments, containsAllIterable, detectWith, detectWithIfNone, detectWithOptional, forEach, groupByUniqueKey, injectInto, into, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toBag, toBiMap, toList, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection
parallelStream, removeIf, stream, toArray

Methods inherited from interface org.eclipse.collections.api.collection.ImmutableCollection
aggregateBy, aggregateInPlaceBy, castToCollection, flatCollectWith, groupByUniqueKey, parallelStream, reduceBy, spliterator, stream, sumByDouble, sumByFloat, sumByInt, sumByLong

Methods inherited from interface org.eclipse.collections.api.set.ImmutableSet
flatCollectWith, toImmutableSet

Methods inherited from interface org.eclipse.collections.api.InternalIterable
forEach

Methods inherited from interface org.eclipse.collections.api.RichIterable
aggregateBy, asLazy, chunk, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectInt, collectLong, collectShort, containsAll, containsAllArguments, containsAllIterable, containsAny, containsAnyIterable, containsBy, containsNone, containsNoneIterable, detectWith, detectWithIfNone, detectWithOptional, flatCollectBoolean, flatCollectByte, flatCollectChar, flatCollectDouble, flatCollectFloat, flatCollectInt, flatCollectLong, flatCollectShort, flatCollectWith, forEach, getAny, groupByAndCollect, groupByUniqueKey, injectInto, injectIntoDouble, injectIntoFloat, injectIntoInt, injectIntoLong, into, makeString, maxByOptional, maxOptional, maxOptional, minByOptional, minOptional, minOptional, reduce, reduceBy, reduceInPlace, reduceInPlace, summarizeDouble, summarizeFloat, summarizeInt, summarizeLong, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toArray, toArray, toBag, toBiMap, toImmutableBag, toImmutableBiMap, toImmutableList, toImmutableMap, toImmutableSortedBag, toImmutableSortedBag, toImmutableSortedBagBy, toImmutableSortedList, toImmutableSortedList, toImmutableSortedListBy, toImmutableSortedSet, toImmutableSortedSet, toImmutableSortedSetBy, toList, toMap, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedList, toSortedList, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy

Methods inherited from interface java.util.Set
add, addAll, clear, containsAll, remove, removeAll, retainAll, spliterator, toArray, toArray

- Field Detail
 - INSTANCE
```
static final ImmutableSet<?> INSTANCE
```
 - EMPTY
```
private static final PartitionImmutableSet<?> EMPTY
```
 - serialVersionUID
```
private static final long serialVersionUID
```
 See Also:
 
 Constant Field Values
- Constructor Detail
 - ImmutableEmptySet
```
ImmutableEmptySet()
```
- Method Detail
 - equals
```
public boolean equals(java.lang.Object other)
```
 Description copied from interface: SetIterable
 
 Follows the same general contract as Set.equals(Object).
 
 Specified by:
 
 equals in interface java.util.Collection<T>
 
 Specified by:
 
 equals in interface java.util.Set<T>
 
 Specified by:
 
 equals in interface SetIterable<T>
 
 Overrides:
 
 equals in class java.lang.Object
 - hashCode
```
public int hashCode()
```
 Description copied from interface: SetIterable
 
 Follows the same general contract as Set.hashCode().
 
 Specified by:
 
 hashCode in interface java.util.Collection<T>
 
 Specified by:
 
 hashCode in interface java.util.Set<T>
 
 Specified by:
 
 hashCode in interface SetIterable<T>
 
 Overrides:
 
 hashCode in class java.lang.Object
 - newWith
```
public ImmutableSet<T> newWith(T element)
```
 Description copied from interface: ImmutableCollection
 
 This method is similar to the with method in MutableCollection with the difference that a new copy of this collection with the element appended will be returned.
 
 Specified by:
 
 newWith in interface ImmutableCollection<T>
 
 Specified by:
 
 newWith in interface ImmutableSet<T>
 
 Overrides:
 
 newWith in class AbstractImmutableSet<T>
 - newWithAll
```
public ImmutableSet<T> newWithAll(java.lang.Iterable<? extends T> elements)
```
 Description copied from interface: ImmutableCollection
 
 This method is similar to the withAll method in MutableCollection with the difference that a new copy of this collection with the elements appended will be returned.
 
 Specified by:
 
 newWithAll in interface ImmutableCollection<T>
 
 Specified by:
 
 newWithAll in interface ImmutableSet<T>
 
 Overrides:
 
 newWithAll in class AbstractImmutableSet<T>
 - newWithout
```
public ImmutableSet<T> newWithout(T element)
```
 Description copied from interface: ImmutableCollection
 
 This method is similar to the without method in MutableCollection with the difference that a new copy of this collection with the element removed will be returned.
 
 Specified by:
 
 newWithout in interface ImmutableCollection<T>
 
 Specified by:
 
 newWithout in interface ImmutableSet<T>
 
 Overrides:
 
 newWithout in class AbstractImmutableSet<T>
 - newWithoutAll
```
public ImmutableSet<T> newWithoutAll(java.lang.Iterable<? extends T> elements)
```
 Description copied from interface: ImmutableCollection
 
 This method is similar to the withoutAll method in MutableCollection with the difference that a new copy of this collection with the elements removed will be returned.
 
 Specified by:
 
 newWithoutAll in interface ImmutableCollection<T>
 
 Specified by:
 
 newWithoutAll in interface ImmutableSet<T>
 
 Overrides:
 
 newWithoutAll in class AbstractImmutableSet<T>
 - size
```
public int size()
```
 Description copied from interface: RichIterable
 
 Returns the number of items in this iterable.
 
 Specified by:
 
 size in interface java.util.Collection<T>
 
 Specified by:
 
 size in interface RichIterable<T>
 
 Specified by:
 
 size in interface java.util.Set<T>
 - contains
```
public boolean contains(java.lang.Object obj)
```
 Description copied from interface: RichIterable
 
 Returns true if the iterable has an element which responds true to element.equals(object).
 
 Specified by:
 
 contains in interface java.util.Collection<T>
 
 Specified by:
 
 contains in interface RichIterable<T>
 
 Specified by:
 
 contains in interface java.util.Set<T>
 
 Overrides:
 
 contains in class AbstractRichIterable<T>
 - tap
```
public ImmutableSet<T> tap(Procedure<? super T> procedure)
```
 Description copied from interface: RichIterable
 Executes the Procedure for each element in the iterable and returns this.
 Example using a Java 8 lambda expression:
 RichIterable<Person> tapped = people.tap(person -> LOGGER.info(person.getName()));
 Specified by:
 
 tap in interface ImmutableCollection<T>
 
 Specified by:
 
 tap in interface ImmutableSet<T>
 
 Specified by:
 
 tap in interface ImmutableSetIterable<T>
 
 Specified by:
 
 tap in interface RichIterable<T>
 
 Specified by:
 
 tap in interface SetIterable<T>
 
 Specified by:
 
 tap in interface UnsortedSetIterable<T>
 
 Overrides:
 
 tap in class AbstractImmutableSet<T>
 
 See Also:
 
 RichIterable.each(Procedure), RichIterable.forEach(Procedure)
 - each
```
public void each(Procedure<? super T> procedure)
```
 Description copied from interface: RichIterable
 The procedure is executed for each element in the iterable.
 Example using a Java 8 lambda expression:
 people.each(person -> LOGGER.info(person.getName()));
 This method is a variant of InternalIterable.forEach(Procedure) that has a signature conflict with Iterable.forEach(java.util.function.Consumer).
 Specified by:
 
 each in interface RichIterable<T>
 
 See Also:
 
 InternalIterable.forEach(Procedure), Iterable.forEach(java.util.function.Consumer)
 - forEachWithIndex
```
public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)
```
 Description copied from interface: InternalIterable
 Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.
 Example using a Java 8 lambda:
 people.forEachWithIndex((Person person, int index) -> LOGGER.info("Index: " + index + " person: " + person.getName()));
 
 Example using an anonymous inner class:
 people.forEachWithIndex(new ObjectIntProcedure<Person>() { public void value(Person person, int index) { LOGGER.info("Index: " + index + " person: " + person.getName()); } });
 Specified by:
 
 forEachWithIndex in interface InternalIterable<T>
 
 Overrides:
 
 forEachWithIndex in class AbstractRichIterable<T>
 - forEachWith
```
public  void forEachWith(Procedure2<? super T,? super P> procedure,
 P parameter)
```
 Description copied from interface: InternalIterable
 The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.
 Example using a Java 8 lambda:
 people.forEachWith((Person person, Person other) -> { if (person.isRelatedTo(other)) { LOGGER.info(person.getName()); } }, fred);
 
 Example using an anonymous inner class:
 people.forEachWith(new Procedure2<Person, Person>() { public void value(Person person, Person other) { if (person.isRelatedTo(other)) { LOGGER.info(person.getName()); } } }, fred);
 Specified by:
 
 forEachWith in interface InternalIterable<T>
 
 Overrides:
 
 forEachWith in class AbstractRichIterable<T>
 - getFirst
```
public T getFirst()
```
 Description copied from interface: RichIterable
 
 Returns the first element of an iterable. In the case of a List it is the element at the first index. In the case of any other Collection, it is the first element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.
 The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the first element could be any element from the Set.
 
 Specified by:
 
 getFirst in interface RichIterable<T>
 - getLast
```
public T getLast()
```
 Description copied from interface: RichIterable
 
 Returns the last element of an iterable. In the case of a List it is the element at the last index. In the case of any other Collection, it is the last element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.
 The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the last element could be any element from the Set.
 
 Specified by:
 
 getLast in interface RichIterable<T>
 - getOnly
```
public T getOnly()
```
 Description copied from interface: RichIterable
 
 Returns the element if the iterable has exactly one element. Otherwise, throw IllegalStateException.
 
 Specified by:
 
 getOnly in interface RichIterable<T>
 
 Returns:
 
 an element of an iterable.
 - iterator
```
public java.util.Iterator<T> iterator()
```
 Specified by:
 
 iterator in interface java.util.Collection<T>
 
 Specified by:
 
 iterator in interface java.lang.Iterable<T>
 
 Specified by:
 
 iterator in interface java.util.Set<T>
 - min
```
public T min(java.util.Comparator<? super T> comparator)
```
 Description copied from interface: RichIterable
 
 Returns the minimum element out of this container based on the comparator.
 
 Specified by:
 
 min in interface RichIterable<T>
 
 Overrides:
 
 min in class AbstractRichIterable<T>
 - max
```
public T max(java.util.Comparator<? super T> comparator)
```
 Description copied from interface: RichIterable
 
 Returns the maximum element out of this container based on the comparator.
 
 Specified by:
 
 max in interface RichIterable<T>
 
 Overrides:
 
 max in class AbstractRichIterable<T>
 - min
```
public T min()
```
 Description copied from interface: RichIterable
 
 Returns the minimum element out of this container based on the natural order.
 
 Specified by:
 
 min in interface RichIterable<T>
 
 Overrides:
 
 min in class AbstractRichIterable<T>
 - max
```
public T max()
```
 Description copied from interface: RichIterable
 
 Returns the maximum element out of this container based on the natural order.
 
 Specified by:
 
 max in interface RichIterable<T>
 
 Overrides:
 
 max in class AbstractRichIterable<T>
 - minBy
```
public <V extends java.lang.Comparable<? super V>> T minBy(Function<? super T,? extends V> function)
```
 Description copied from interface: RichIterable
 
 Returns the minimum elements out of this container based on the natural order of the attribute returned by Function.
 
 Specified by:
 
 minBy in interface RichIterable<T>
 
 Overrides:
 
 minBy in class AbstractRichIterable<T>
 - maxBy
```
public <V extends java.lang.Comparable<? super V>> T maxBy(Function<? super T,? extends V> function)
```
 Description copied from interface: RichIterable
 
 Returns the maximum elements out of this container based on the natural order of the attribute returned by Function.
 
 Specified by:
 
 maxBy in interface RichIterable<T>
 
 Overrides:
 
 maxBy in class AbstractRichIterable<T>
 - zip
```
@Deprecated
public <S> ImmutableSet<Pair<T,S>> zip(java.lang.Iterable<S> that)
```
 Deprecated.
 in 6.0. Use OrderedIterable.zip(Iterable) instead.
 
 Description copied from interface: RichIterable
 
 Returns a RichIterable formed from this RichIterable and another RichIterable by combining corresponding elements in pairs. If one of the two RichIterables is longer than the other, its remaining elements are ignored.
 
 Specified by:
 
 zip in interface ImmutableCollection<T>
 
 Specified by:
 
 zip in interface ImmutableSet<T>
 
 Specified by:
 
 zip in interface RichIterable<T>
 
 Specified by:
 
 zip in interface UnsortedSetIterable<T>
 
 Overrides:
 
 zip in class AbstractImmutableSet<T>
 
 Type Parameters:
 
 S - the type of the second half of the returned pairs
 
 Parameters:
 
 that - The RichIterable providing the second half of each result pair
 
 Returns:
 
 A new RichIterable containing pairs consisting of corresponding elements of this RichIterable and that. The length of the returned RichIterable is the minimum of the lengths of this RichIterable and that.
 - zip
```
public <S,R extends java.util.Collection<Pair<T,S>>> R zip(java.lang.Iterable<S> that,
 R target)
```
 Description copied from interface: RichIterable
 
 Same as RichIterable.zip(Iterable) but uses target for output.
 
 Specified by:
 
 zip in interface RichIterable<T>
 
 Overrides:
 
 zip in class AbstractRichIterable<T>
 - zipWithIndex
```
@Deprecated
public ImmutableSet<Pair<T,java.lang.Integer>> zipWithIndex()
```
 Deprecated.
 in 6.0. Use OrderedIterable.zipWithIndex() instead.
 
 Description copied from interface: RichIterable
 
 Zips this RichIterable with its indices.
 
 Specified by:
 
 zipWithIndex in interface ImmutableCollection<T>
 
 Specified by:
 
 zipWithIndex in interface ImmutableSet<T>
 
 Specified by:
 
 zipWithIndex in interface ImmutableSetIterable<T>
 
 Specified by:
 
 zipWithIndex in interface RichIterable<T>
 
 Specified by:
 
 zipWithIndex in interface SetIterable<T>
 
 Specified by:
 
 zipWithIndex in interface UnsortedSetIterable<T>
 
 Overrides:
 
 zipWithIndex in class AbstractImmutableSet<T>
 
 Returns:
 
 A new RichIterable containing pairs consisting of all elements of this RichIterable paired with their index. Indices start at 0.
 
 See Also:
 
 RichIterable.zip(Iterable)
 - zipWithIndex
```
public <R extends java.util.Collection<Pair<T,java.lang.Integer>>> R zipWithIndex(R target)
```
 Description copied from interface: RichIterable
 
 Same as RichIterable.zipWithIndex() but uses target for output.
 
 Specified by:
 
 zipWithIndex in interface RichIterable<T>
 
 Overrides:
 
 zipWithIndex in class AbstractRichIterable<T>
 - select
```
public ImmutableSet<T> select(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Returns all elements of the source collection that return true when evaluating the predicate. This method is also commonly called filter.
 Example using a Java 8 lambda expression:
 RichIterable<Person> selected = people.select(person -> person.getAddress().getCity().equals("London"));
 Specified by:
 
 select in interface ImmutableCollection<T>
 
 Specified by:
 
 select in interface ImmutableSet<T>
 
 Specified by:
 
 select in interface ImmutableSetIterable<T>
 
 Specified by:
 
 select in interface RichIterable<T>
 
 Specified by:
 
 select in interface SetIterable<T>
 
 Specified by:
 
 select in interface UnsortedSetIterable<T>
 
 Overrides:
 
 select in class AbstractImmutableSet<T>
 - reject
```
public ImmutableSet<T> reject(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Returns all elements of the source collection that return false when evaluating of the predicate. This method is also sometimes called filterNot and is the equivalent of calling iterable.select(Predicates.not(predicate)).
 Example using a Java 8 lambda expression:
 RichIterable<Person> rejected = people.reject(person -> person.person.getLastName().equals("Smith"));
 Specified by:
 
 reject in interface ImmutableCollection<T>
 
 Specified by:
 
 reject in interface ImmutableSet<T>
 
 Specified by:
 
 reject in interface ImmutableSetIterable<T>
 
 Specified by:
 
 reject in interface RichIterable<T>
 
 Specified by:
 
 reject in interface SetIterable<T>
 
 Specified by:
 
 reject in interface UnsortedSetIterable<T>
 
 Overrides:
 
 reject in class AbstractImmutableSet<T>
 
 Parameters:
 
 predicate - a Predicate to use as the reject criteria
 
 Returns:
 
 a RichIterable that contains elements that cause Predicate.accept(Object) method to evaluate to false
 - partition
```
public PartitionImmutableSet<T> partition(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Filters a collection into a PartitionedIterable based on the evaluation of the predicate.
 Example using a Java 8 lambda expression:
 PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(person -> person.getAddress().getState().getName().equals("New York"));
 Specified by:
 
 partition in interface ImmutableCollection<T>
 
 Specified by:
 
 partition in interface ImmutableSet<T>
 
 Specified by:
 
 partition in interface ImmutableSetIterable<T>
 
 Specified by:
 
 partition in interface RichIterable<T>
 
 Specified by:
 
 partition in interface SetIterable<T>
 
 Overrides:
 
 partition in class AbstractImmutableSet<T>
 - collect
```
public <V> ImmutableSet<V> collect(Function<? super T,? extends V> function)
```
 Description copied from interface: RichIterable
 Returns a new collection with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.
 Example using a Java 8 lambda expression:
 RichIterable<String> names = people.collect(person -> person.getFirstName() + " " + person.getLastName());
 Specified by:
 
 collect in interface ImmutableCollection<T>
 
 Specified by:
 
 collect in interface ImmutableSet<T>
 
 Specified by:
 
 collect in interface RichIterable<T>
 
 Specified by:
 
 collect in interface UnsortedSetIterable<T>
 
 Overrides:
 
 collect in class AbstractImmutableSet<T>
 - collectIf
```
public <V> ImmutableSet<V> collectIf(Predicate<? super T> predicate,
 Function<? super T,? extends V> function)
```
 Description copied from interface: RichIterable
 Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate. This is the optimized equivalent of calling iterable.select(predicate).collect(function).
 Example using a Java 8 lambda and method reference:
 RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(e -> e != null, Object::toString);
 
 Example using Predicates factory:
 RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(Predicates.notNull(), Functions.getToString());
 Specified by:
 
 collectIf in interface ImmutableCollection<T>
 
 Specified by:
 
 collectIf in interface ImmutableSet<T>
 
 Specified by:
 
 collectIf in interface RichIterable<T>
 
 Specified by:
 
 collectIf in interface UnsortedSetIterable<T>
 
 Overrides:
 
 collectIf in class AbstractImmutableSet<T>
 - flatCollect
```
public <V> ImmutableSet<V> flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function)
```
 Description copied from interface: RichIterable
 flatCollect is a special case of RichIterable.collect(Function). With collect, when the Function returns a collection, the result is a collection of collections. flatCollect outputs a single "flattened" collection instead. This method is commonly called flatMap.
 Consider the following example where we have a Person class, and each Person has a list of Address objects. Take the following Function:
 Function<Person, List<Address>> addressFunction = Person::getAddresses; RichIterable<Person> people = ...;
 Using collect returns a collection of collections of addresses.
 RichIterable<List<Address>> addresses = people.collect(addressFunction);
 Using flatCollect returns a single flattened list of addresses.
 RichIterable<Address> addresses = people.flatCollect(addressFunction);
 Specified by:
 
 flatCollect in interface ImmutableCollection<T>
 
 Specified by:
 
 flatCollect in interface ImmutableSet<T>
 
 Specified by:
 
 flatCollect in interface RichIterable<T>
 
 Specified by:
 
 flatCollect in interface UnsortedSetIterable<T>
 
 Overrides:
 
 flatCollect in class AbstractImmutableSet<T>
 
 Parameters:
 
 function - The Function to apply
 
 Returns:
 
 a new flattened collection produced by applying the given function
 - countBy
```
public <V> ImmutableBag<V> countBy(Function<? super T,? extends V> function)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
 
 Specified by:
 
 countBy in interface ImmutableCollection<T>
 
 Specified by:
 
 countBy in interface RichIterable<T>
 
 Overrides:
 
 countBy in class AbstractImmutableCollection<T>
 
 Since:
 
 9.0
 - countBy
```
public <V,R extends MutableBagIterable<V>> R countBy(Function<? super T,? extends V> function,
 R target)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
 
 Specified by:
 
 countBy in interface RichIterable<T>
 
 Since:
 
 9.0
 - countByWith
```
public <V,P> ImmutableBag<V> countByWith(Function2<? super T,? super P,? extends V> function,
 P parameter)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.
 
 Specified by:
 
 countByWith in interface ImmutableCollection<T>
 
 Specified by:
 
 countByWith in interface RichIterable<T>
 
 Overrides:
 
 countByWith in class AbstractImmutableCollection<T>
 
 Since:
 
 9.0
 - countByWith
```
public <V,P,R extends MutableBagIterable<V>> R countByWith(Function2<? super T,? super P,? extends V> function,
 P parameter,
 R target)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection with the specified parameter as the second argument.
 
 Specified by:
 
 countByWith in interface RichIterable<T>
 
 Since:
 
 9.0
 - countByEach
```
public <V> ImmutableBag<V> countByEach(Function<? super T,? extends java.lang.Iterable<V>> function)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
 
 Specified by:
 
 countByEach in interface ImmutableCollection<T>
 
 Specified by:
 
 countByEach in interface RichIterable<T>
 
 Overrides:
 
 countByEach in class AbstractImmutableCollection<T>
 
 Since:
 
 10.0.0
 - countByEach
```
public <V,R extends MutableBagIterable<V>> R countByEach(Function<? super T,? extends java.lang.Iterable<V>> function,
 R target)
```
 Description copied from interface: RichIterable
 
 This method will count the number of occurrences of each value calculated by applying the function to each element of the collection.
 
 Specified by:
 
 countByEach in interface RichIterable<T>
 
 Since:
 
 10.0.0
 - groupBy
```
public <V,R extends MutableMultimap<V,T>> R groupBy(Function<? super T,? extends V> function,
 R target)
```
 Description copied from interface: RichIterable
 Same as RichIterable.groupBy(Function), except that the results are gathered into the specified target multimap.
 Example using a Java 8 method reference:
 FastListMultimap<String, Person> peopleByLastName = people.groupBy(Person::getLastName, new FastListMultimap<String, Person>());
 Specified by:
 
 groupBy in interface RichIterable<T>
 
 Overrides:
 
 groupBy in class AbstractImmutableSet<T>
 - groupByEach
```
public <V,R extends MutableMultimap<V,T>> R groupByEach(Function<? super T,? extends java.lang.Iterable<V>> function,
 R target)
```
 Description copied from interface: RichIterable
 
 Same as RichIterable.groupByEach(Function), except that the results are gathered into the specified target multimap.
 
 Specified by:
 
 groupByEach in interface RichIterable<T>
 
 Overrides:
 
 groupByEach in class AbstractImmutableSet<T>
 - isEmpty
```
public boolean isEmpty()
```
 Description copied from interface: RichIterable
 
 Returns true if this iterable has zero items.
 
 Specified by:
 
 isEmpty in interface java.util.Collection<T>
 
 Specified by:
 
 isEmpty in interface RichIterable<T>
 
 Specified by:
 
 isEmpty in interface java.util.Set<T>
 
 Overrides:
 
 isEmpty in class AbstractRichIterable<T>
 - notEmpty
```
public boolean notEmpty()
```
 Description copied from interface: RichIterable
 
 The English equivalent of !this.isEmpty()
 
 Specified by:
 
 notEmpty in interface RichIterable<T>
 - select
```
public <R extends java.util.Collection<T>> R select(Predicate<? super T> predicate,
 R target)
```
 Description copied from interface: RichIterable
 Same as the select method with one parameter but uses the specified target collection for the results.
 Example using a Java 8 lambda expression:
 MutableList<Person> selected = people.select(person -> person.person.getLastName().equals("Smith"), Lists.mutable.empty());
 Specified by:
 
 select in interface RichIterable<T>
 
 Overrides:
 
 select in class AbstractRichIterable<T>
 
 Parameters:
 
 predicate - a Predicate to use as the select criteria
 
 target - the Collection to append to for all elements in this RichIterable that meet select criteria predicate
 
 Returns:
 
 target, which contains appended elements as a result of the select criteria
 
 See Also:
 
 RichIterable.select(Predicate)
 - selectWith
```
public <P,R extends java.util.Collection<T>> R selectWith(Predicate2<? super T,? super P> predicate,
 P parameter,
 R target)
```
 Description copied from interface: RichIterable
 Similar to RichIterable.select(Predicate, Collection), except with an evaluation parameter for the second generic argument in Predicate2.
 E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years
 Example using a Java 8 lambda expression:
 MutableList<Person> selected = people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18), Lists.mutable.empty());
 Specified by:
 
 selectWith in interface RichIterable<T>
 
 Overrides:
 
 selectWith in class AbstractRichIterable<T>
 
 Parameters:
 
 predicate - a Predicate2 to use as the select criteria
 
 parameter - a parameter to pass in for evaluation of the second argument P in predicate
 
 target - the Collection to append to for all elements in this RichIterable that meet select criteria predicate
 
 Returns:
 
 targetCollection, which contains appended elements as a result of the select criteria
 
 See Also:
 
 RichIterable.select(Predicate), RichIterable.select(Predicate, Collection)
 - reject
```
public <R extends java.util.Collection<T>> R reject(Predicate<? super T> predicate,
 R target)
```
 Description copied from interface: RichIterable
 Same as the reject method with one parameter but uses the specified target collection for the results.
 Example using a Java 8 lambda expression:
 MutableList<Person> rejected = people.reject(person -> person.person.getLastName().equals("Smith"), Lists.mutable.empty());
 Specified by:
 
 reject in interface RichIterable<T>
 
 Overrides:
 
 reject in class AbstractRichIterable<T>
 
 Parameters:
 
 predicate - a Predicate to use as the reject criteria
 
 target - the Collection to append to for all elements in this RichIterable that cause Predicate#accept(Object) method to evaluate to false
 
 Returns:
 
 target, which contains appended elements as a result of the reject criteria
 - rejectWith
```
public <P,R extends java.util.Collection<T>> R rejectWith(Predicate2<? super T,? super P> predicate,
 P parameter,
 R target)
```
 Description copied from interface: RichIterable
 Similar to RichIterable.reject(Predicate, Collection), except with an evaluation parameter for the second generic argument in Predicate2.
 E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years
 Example using a Java 8 lambda expression:
 MutableList<Person> rejected = people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18), Lists.mutable.empty());
 Specified by:
 
 rejectWith in interface RichIterable<T>
 
 Overrides:
 
 rejectWith in class AbstractRichIterable<T>
 
 Parameters:
 
 predicate - a Predicate2 to use as the reject criteria
 
 parameter - a parameter to pass in for evaluation of the second argument P in predicate
 
 target - the Collection to append to for all elements in this RichIterable that cause Predicate#accept(Object) method to evaluate to false
 
 Returns:
 
 targetCollection, which contains appended elements as a result of the reject criteria
 
 See Also:
 
 RichIterable.reject(Predicate), RichIterable.reject(Predicate, Collection)
 - collect
```
public <V,R extends java.util.Collection<V>> R collect(Function<? super T,? extends V> function,
 R target)
```
 Description copied from interface: RichIterable
 Same as RichIterable.collect(Function), except that the results are gathered into the specified target collection.
 Example using a Java 8 lambda expression:
 MutableList<String> names = people.collect(person -> person.getFirstName() + " " + person.getLastName(), Lists.mutable.empty());
 Specified by:
 
 collect in interface RichIterable<T>
 
 Overrides:
 
 collect in class AbstractRichIterable<T>
 
 Parameters:
 
 function - a Function to use as the collect transformation function
 
 target - the Collection to append to for all elements in this RichIterable that meet select criteria function
 
 Returns:
 
 target, which contains appended elements as a result of the collect transformation
 
 See Also:
 
 RichIterable.collect(Function)
 - collectWith
```
public <P,V,R extends java.util.Collection<V>> R collectWith(Function2<? super T,? super P,? extends V> function,
 P parameter,
 R target)
```
 Description copied from interface: RichIterable
 Same as collectWith but with a targetCollection parameter to gather the results.
 Example using a Java 8 lambda expression:
 MutableSet<Integer> integers = Lists.mutable.with(1, 2, 3).collectWith((each, parameter) -> each + parameter, Integer.valueOf(1), Sets.mutable.empty());
 Specified by:
 
 collectWith in interface RichIterable<T>
 
 Overrides:
 
 collectWith in class AbstractRichIterable<T>
 
 Parameters:
 
 function - a Function2 to use as the collect transformation function
 
 parameter - a parameter to pass in for evaluation of the second argument P in function
 
 target - the Collection to append to for all elements in this RichIterable that meet select criteria function
 
 Returns:
 
 targetCollection, which contains appended elements as a result of the collect transformation
 - collectIf
```
public <V,R extends java.util.Collection<V>> R collectIf(Predicate<? super T> predicate,
 Function<? super T,? extends V> function,
 R target)
```
 Description copied from interface: RichIterable
 
 Same as the collectIf method with two parameters but uses the specified target collection for the results.
 
 Specified by:
 
 collectIf in interface RichIterable<T>
 
 Overrides:
 
 collectIf in class AbstractRichIterable<T>
 
 Parameters:
 
 predicate - a Predicate to use as the select criteria
 
 function - a Function to use as the collect transformation function
 
 target - the Collection to append to for all elements in this RichIterable that meet the collect criteria predicate
 
 Returns:
 
 targetCollection, which contains appended elements as a result of the collect criteria and transformation
 
 See Also:
 
 RichIterable.collectIf(Predicate, Function)
 - detectIfNone
```
public T detectIfNone(Predicate<? super T> predicate,
 Function0<? extends T> function)
```
 Description copied from interface: RichIterable
 
 Returns the first element of the iterable for which the predicate evaluates to true. If no element matches the predicate, then returns the value of applying the specified function.
 
 Specified by:
 
 detectIfNone in interface RichIterable<T>
 - flatCollect
```
public <V,R extends java.util.Collection<V>> R flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function,
 R target)
```
 Description copied from interface: RichIterable
 
 Same as flatCollect, only the results are collected into the target collection.
 
 Specified by:
 
 flatCollect in interface RichIterable<T>
 
 Overrides:
 
 flatCollect in class AbstractRichIterable<T>
 
 Parameters:
 
 function - The Function to apply
 
 target - The collection into which results should be added.
 
 Returns:
 
 target, which will contain a flattened collection of results produced by applying the given function
 
 See Also:
 
 RichIterable.flatCollect(Function)
 - detect
```
public T detect(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Returns the first element of the iterable for which the predicate evaluates to true or null in the case where no element returns true. This method is commonly called find.
 Example using a Java 8 lambda expression:
 Person person = people.detect(person -> person.getFirstName().equals("John") && person.getLastName().equals("Smith"));
 Specified by:
 
 detect in interface RichIterable<T>
 
 Overrides:
 
 detect in class AbstractRichIterable<T>
 - detectOptional
```
public java.util.Optional<T> detectOptional(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Returns the first element of the iterable for which the predicate evaluates to true as an Optional. This method is commonly called find.
 Example using a Java 8 lambda expression:
 Person person = people.detectOptional(person -> person.getFirstName().equals("John") && person.getLastName().equals("Smith"));
 Specified by:
 
 detectOptional in interface RichIterable<T>
 
 Overrides:
 
 detectOptional in class AbstractRichIterable<T>
 - count
```
public int count(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 Return the total number of elements that answer true to the specified predicate.
 Example using a Java 8 lambda expression:
 int count = people.count(person -> person.getAddress().getState().getName().equals("New York"));
 Specified by:
 
 count in interface RichIterable<T>
 
 Overrides:
 
 count in class AbstractRichIterable<T>
 - countWith
```
public  int countWith(Predicate2<? super T,? super P> predicate,
 P parameter)
```
 Description copied from interface: RichIterable
 Returns the total number of elements that evaluate to true for the specified predicate.
 e.g. return lastNames.countWith(Predicates2.equal(), "Smith");
 Specified by:
 
 countWith in interface RichIterable<T>
 
 Overrides:
 
 countWith in class AbstractRichIterable<T>
 - anySatisfy
```
public boolean anySatisfy(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to true for any element of the iterable. Returns false if the iterable is empty, or if no element returned true when evaluating the predicate.
 
 Specified by:
 
 anySatisfy in interface RichIterable<T>
 
 Overrides:
 
 anySatisfy in class AbstractRichIterable<T>
 - allSatisfy
```
public boolean allSatisfy(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to true for every element of the iterable or if the iterable is empty. Otherwise, returns false.
 
 Specified by:
 
 allSatisfy in interface RichIterable<T>
 
 Overrides:
 
 allSatisfy in class AbstractRichIterable<T>
 - noneSatisfy
```
public boolean noneSatisfy(Predicate<? super T> predicate)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to false for every element of the iterable or if the iterable is empty. Otherwise, returns false.
 
 Specified by:
 
 noneSatisfy in interface RichIterable<T>
 
 Overrides:
 
 noneSatisfy in class AbstractRichIterable<T>
 - anySatisfyWith
```
public  boolean anySatisfyWith(Predicate2<? super T,? super P> predicate,
 P parameter)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to true for any element of the collection, or return false. Returns false if the collection is empty.
 
 Specified by:
 
 anySatisfyWith in interface RichIterable<T>
 
 Overrides:
 
 anySatisfyWith in class AbstractRichIterable<T>
 - allSatisfyWith
```
public  boolean allSatisfyWith(Predicate2<? super T,? super P> predicate,
 P parameter)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to true for every element of the collection, or returns false.
 
 Specified by:
 
 allSatisfyWith in interface RichIterable<T>
 
 Overrides:
 
 allSatisfyWith in class AbstractRichIterable<T>
 - noneSatisfyWith
```
public  boolean noneSatisfyWith(Predicate2<? super T,? super P> predicate,
 P parameter)
```
 Description copied from interface: RichIterable
 
 Returns true if the predicate evaluates to false for every element of the collection, or return false. Returns true if the collection is empty.
 
 Specified by:
 
 noneSatisfyWith in interface RichIterable<T>
 
 Overrides:
 
 noneSatisfyWith in class AbstractRichIterable<T>
 - injectInto
```
public <IV> IV injectInto(IV injectedValue,
 Function2<? super IV,? super T,? extends IV> function)
```
 Description copied from interface: RichIterable
 
 Returns the final result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter. This method is commonly called fold or sometimes reduce.
 
 Specified by:
 
 injectInto in interface RichIterable<T>
 
 Overrides:
 
 injectInto in class AbstractRichIterable<T>
 - injectInto
```
public int injectInto(int injectedValue,
 IntObjectToIntFunction<? super T> intObjectToIntFunction)
```
 Description copied from interface: RichIterable
 
 Returns the final int result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
 
 Specified by:
 
 injectInto in interface RichIterable<T>
 
 Overrides:
 
 injectInto in class AbstractRichIterable<T>
 - injectInto
```
public long injectInto(long injectedValue,
 LongObjectToLongFunction<? super T> longObjectToLongFunction)
```
 Description copied from interface: RichIterable
 
 Returns the final long result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
 
 Specified by:
 
 injectInto in interface RichIterable<T>
 
 Overrides:
 
 injectInto in class AbstractRichIterable<T>
 - injectInto
```
public double injectInto(double injectedValue,
 DoubleObjectToDoubleFunction<? super T> doubleObjectToDoubleFunction)
```
 Description copied from interface: RichIterable
 
 Returns the final double result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
 
 Specified by:
 
 injectInto in interface RichIterable<T>
 
 Overrides:
 
 injectInto in class AbstractRichIterable<T>
 - toString
```
public java.lang.String toString()
```
 Description copied from class: AbstractRichIterable
 Returns a string with the elements of the iterable separated by commas with spaces and enclosed in square brackets.
 Assert.assertEquals("[]", Lists.mutable.empty().toString()); Assert.assertEquals("[1]", Lists.mutable.with(1).toString()); Assert.assertEquals("[1, 2, 3]", Lists.mutable.with(1, 2, 3).toString());
 Specified by:
 
 toString in interface RichIterable<T>
 
 Overrides:
 
 toString in class AbstractRichIterable<T>
 
 Returns:
 
 a string representation of this collection.
 
 See Also:
 
 AbstractCollection.toString()
 - makeString
```
public java.lang.String makeString()
```
 Description copied from interface: RichIterable
 
 Returns a string representation of this collection by delegating to RichIterable.makeString(String) and defaulting the separator parameter to the characters ", " (comma and space).
 
 Specified by:
 
 makeString in interface RichIterable<T>
 
 Returns:
 
 a string representation of this collection.
 - makeString
```
public java.lang.String makeString(java.lang.String separator)
```
 Description copied from interface: RichIterable
 
 Returns a string representation of this collection by delegating to RichIterable.makeString(String, String, String) and defaulting the start and end parameters to "" (the empty String).
 
 Specified by:
 
 makeString in interface RichIterable<T>
 
 Returns:
 
 a string representation of this collection.
 - makeString
```
public java.lang.String makeString(java.lang.String start,
 java.lang.String separator,
 java.lang.String end)
```
 Description copied from interface: RichIterable
 
 Returns a string representation of this collection with the elements separated by the specified separator and enclosed between the start and end strings.
 
 Specified by:
 
 makeString in interface RichIterable<T>
 
 Returns:
 
 a string representation of this collection.
 - appendString
```
public void appendString(java.lang.Appendable appendable)
```
 Description copied from interface: RichIterable
 
 Prints a string representation of this collection onto the given Appendable. Prints the string returned by RichIterable.makeString().
 
 Specified by:
 
 appendString in interface RichIterable<T>
 - appendString
```
public void appendString(java.lang.Appendable appendable,
 java.lang.String separator)
```
 Description copied from interface: RichIterable
 
 Prints a string representation of this collection onto the given Appendable. Prints the string returned by RichIterable.makeString(String).
 
 Specified by:
 
 appendString in interface RichIterable<T>
 
 Overrides:
 
 appendString in class AbstractRichIterable<T>
 - appendString
```
public void appendString(java.lang.Appendable appendable,
 java.lang.String start,
 java.lang.String separator,
 java.lang.String end)
```
 Description copied from interface: RichIterable
 
 Prints a string representation of this collection onto the given Appendable. Prints the string returned by RichIterable.makeString(String, String, String).
 
 Specified by:
 
 appendString in interface RichIterable<T>
 
 Overrides:
 
 appendString in class AbstractRichIterable<T>
 - writeReplace
```
private java.lang.Object writeReplace()
```

Modifier and Type	Field	Description
`private static PartitionImmutableSet<?>`	`EMPTY`
`(package private) static ImmutableSet<?>`	`INSTANCE`
`private static long`	`serialVersionUID`

Class ImmutableEmptySet<T>

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.collections.impl.set.immutable.AbstractImmutableSet

Field Summary

Constructor Summary

Method Summary

Methods inherited from class org.eclipse.collections.impl.set.immutable.AbstractImmutableSet

Methods inherited from class org.eclipse.collections.impl.collection.immutable.AbstractImmutableCollection

Methods inherited from class org.eclipse.collections.impl.AbstractRichIterable

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Collection

Methods inherited from interface org.eclipse.collections.api.collection.ImmutableCollection

Methods inherited from interface org.eclipse.collections.api.set.ImmutableSet

Methods inherited from interface org.eclipse.collections.api.InternalIterable

Methods inherited from interface org.eclipse.collections.api.RichIterable

Methods inherited from interface java.util.Set

Field Detail

INSTANCE

EMPTY

serialVersionUID

Constructor Detail

ImmutableEmptySet

Method Detail

equals

hashCode

newWith

newWithAll

newWithout

newWithoutAll

size

contains

tap

each

forEachWithIndex

forEachWith

getFirst

getLast

getOnly

iterator

min

max

min

max

minBy

maxBy

zip

zip

zipWithIndex

zipWithIndex

select

reject

partition

collect

collectIf

flatCollect

countBy

countBy

countByWith

countByWith

countByEach

countByEach

groupBy

groupByEach

isEmpty

notEmpty

select

selectWith

reject

rejectWith

collect

collectWith

collectIf

detectIfNone

flatCollect

detect

detectOptional

count

countWith

anySatisfy

allSatisfy