Class DoublePriorityQueues.SynchronizedPriorityQueue

java.lang.Object

it.unimi.dsi.fastutil.doubles.DoublePriorityQueues.SynchronizedPriorityQueue

All Implemented Interfaces:

DoublePriorityQueue, PriorityQueue<Double>

Enclosing class:

DoublePriorityQueues

public static class DoublePriorityQueues.SynchronizedPriorityQueue
extends Object
implements DoublePriorityQueue

A synchronized wrapper class for priority queues.

Method Summary

Modifier and Type	Method	Description
void	changed()	Notifies the queue that the first element has changed (optional operation).
void	clear()	Removes all elements from this queue.
DoubleComparator	comparator()	Returns the comparator associated with this priority queue, or null if it uses its elements' natural ordering.
Double	dequeue()	Deprecated.
double	dequeueDouble()	Dequeues the first element from the queue.
void	enqueue(double x)	Enqueues a new element.
void	enqueue(Double x)	Deprecated.
boolean	equals(Object o)
Double	first()	Deprecated.
double	firstDouble()	Returns the first element of the queue.
int	hashCode()
boolean	isEmpty()	Checks whether this queue is empty.
Double	last()	Deprecated.
double	lastDouble()	Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).
int	size()	Returns the number of elements in this queue.

Methods inherited from class Object

getClass, notify, notifyAll, toString, wait, wait, wait

Method Details

enqueue

public void enqueue(double x)

Description copied from interface: DoublePriorityQueue

Enqueues a new element.

Specified by:

enqueue in interface DoublePriorityQueue

Parameters:

x - the element to enqueue.

See Also:

• PriorityQueue.enqueue(Object)

dequeueDouble

public double dequeueDouble()

Description copied from interface: DoublePriorityQueue

Dequeues the first element from the queue.

Specified by:

dequeueDouble in interface DoublePriorityQueue

Returns:

the dequeued element.

See Also:

• DoublePriorityQueue.dequeue()

firstDouble

public double firstDouble()

Description copied from interface: DoublePriorityQueue

Returns the first element of the queue.

Specified by:

firstDouble in interface DoublePriorityQueue

Returns:

the first element.

See Also:

• DoublePriorityQueue.first()

lastDouble

public double lastDouble()

Description copied from interface: DoublePriorityQueue

Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).

This default implementation just throws an UnsupportedOperationException.

Specified by:

lastDouble in interface DoublePriorityQueue

Returns:

the last element.

See Also:

• DoublePriorityQueue.last()

isEmpty

public boolean isEmpty()

Description copied from interface: PriorityQueue

Checks whether this queue is empty.

This default implementation checks whether PriorityQueue.size() is zero.

Specified by:

isEmpty in interface PriorityQueue<Double>

Returns:

true if this queue is empty.

size

public int size()

Description copied from interface: PriorityQueue

Returns the number of elements in this queue.

Specified by:

size in interface PriorityQueue<Double>

Returns:

the number of elements in this queue.

clear

public void clear()

Description copied from interface: PriorityQueue

Removes all elements from this queue.

Specified by:

clear in interface PriorityQueue<Double>

changed

public void changed()

Description copied from interface: PriorityQueue

Notifies the queue that the first element has changed (optional operation).

This default implementation just throws an UnsupportedOperationException.

Specified by:

changed in interface PriorityQueue<Double>

comparator

public DoubleComparator comparator()

Description copied from interface: DoublePriorityQueue

Returns the comparator associated with this priority queue, or null if it uses its elements' natural ordering.

Specified by:

comparator in interface DoublePriorityQueue

Specified by:

comparator in interface PriorityQueue<Double>

Returns:

the comparator associated with this priority queue.

See Also:

• PriorityQueue.comparator()

enqueue

@Deprecated
public void enqueue(Double x)

Deprecated.

Description copied from interface: DoublePriorityQueue

Enqueues a new element.

This default implementation delegates to the corresponding type-specific method.

Specified by:

enqueue in interface DoublePriorityQueue

Specified by:

enqueue in interface PriorityQueue<Double>

Parameters:

x - the element to enqueue.

dequeue

@Deprecated
public Double dequeue()

Deprecated.

Description copied from interface: DoublePriorityQueue

Dequeues the first element from the queue.

This default implementation delegates to the corresponding type-specific method.

Specified by:

dequeue in interface DoublePriorityQueue

Specified by:

dequeue in interface PriorityQueue<Double>

Returns:

the dequeued element.

first

@Deprecated
public Double first()

Deprecated.

Description copied from interface: DoublePriorityQueue

Returns the first element of the queue.

This default implementation delegates to the corresponding type-specific method.

Specified by:

first in interface DoublePriorityQueue

Specified by:

first in interface PriorityQueue<Double>

Returns:

the first element.

last

@Deprecated
public Double last()

Deprecated.

Description copied from interface: DoublePriorityQueue

Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).

This default implementation just throws an UnsupportedOperationException.

This default implementation delegates to the corresponding type-specific method.

Specified by:

last in interface DoublePriorityQueue

Specified by:

last in interface PriorityQueue<Double>

Returns:

the last element.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object