HashTreePSet

java.lang.Object
- org.pcollections.HashTreePSet

```
public final class HashTreePSet
extends java.lang.Object
```
A static convenience class for creating efficient persistent sets.
This class simply creates MapPSets backed by HashTreePMaps.

Field Summary

Fields
Modifier and Type Field Description

private static MapPSet<java.lang.Object> EMPTY

Constructor Summary

Constructors
Modifier Constructor Description

private HashTreePSet()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <E> MapPSet<E>`	`empty()`
`static <E> MapPSet<E>`	`from(java.util.Collection<? extends E> list)`
`static <E> MapPSet<E>`	`singleton(E e)`

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

Field Detail

EMPTY

private static final MapPSet<java.lang.Object> EMPTY

Constructor Detail
- HashTreePSet
```
private HashTreePSet()
```

Method Detail
- empty
```
public static <E> MapPSet<E> empty()
```
  Type Parameters:
  
  E -
  
  Returns:
  
  an empty set
- singleton
```
public static <E> MapPSet<E> singleton(E e)
```
  Type Parameters:
  
  E -
  
  Parameters:
  
  e -
  
  Returns:
  
  empty().plus(e)
- from
```
public static <E> MapPSet<E> from(java.util.Collection<? extends E> list)
```
  Type Parameters:
  
  E -
  
  Parameters:
  
  list -
  
  Returns:
  
  empty().plusAll(map)