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

java.lang.Object
  it.unimi.dsi.fastutil.doubles.DoublePriorityQueues.SynchronizedPriorityQueue

All Implemented Interfaces:

DoublePriorityQueue, PriorityQueue<java.lang.Double>

Enclosing class:

DoublePriorityQueues

public static class DoublePriorityQueues.SynchronizedPriorityQueue
extends java.lang.Object
implements DoublePriorityQueue

A synchronized wrapper class for priority queues.

Method Summary

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 sorted set, or null if it uses its elements' natural ordering.
java.lang.Double	dequeue() Dequeues the first element from the queue.
double	dequeueDouble() Dequeues the first element from the queue.
void	enqueue(double x) Enqueues a new element.
void	enqueue(java.lang.Double x) Enqueues a new element.
java.lang.Double	first() Returns the first element of the queue.
double	firstDouble() Returns the first element of the queue.
boolean	isEmpty() Checks whether the queue is empty.
java.lang.Double	last() Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).
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 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

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.

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.

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.

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).

Specified by:

lastDouble in interface DoublePriorityQueue

Returns:

the last element.

isEmpty

public boolean isEmpty()

Description copied from interface: PriorityQueue

Checks whether the queue is empty.

Specified by:

isEmpty in interface PriorityQueue<java.lang.Double>

Returns:

true if the 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<java.lang.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<java.lang.Double>

changed

public void changed()

Description copied from interface: PriorityQueue

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

Specified by:

changed in interface PriorityQueue<java.lang.Double>

comparator

public DoubleComparator comparator()

Description copied from interface: DoublePriorityQueue

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

Note that this specification strengthens the one given in PriorityQueue.comparator().

Specified by:

comparator in interface DoublePriorityQueue

Specified by:

comparator in interface PriorityQueue<java.lang.Double>

Returns:

the comparator associated with this sorted set, or null if it uses its elements' natural ordering.

See Also:

PriorityQueue.comparator()

enqueue

public void enqueue(java.lang.Double x)

Description copied from interface: PriorityQueue

Enqueues a new element.

Specified by:

enqueue in interface PriorityQueue<java.lang.Double>

Parameters:

x - the element to enqueue..

dequeue

public java.lang.Double dequeue()

Description copied from interface: PriorityQueue

Dequeues the first element from the queue.

Specified by:

dequeue in interface PriorityQueue<java.lang.Double>

Returns:

the dequeued element.

first

public java.lang.Double first()

Description copied from interface: PriorityQueue

Returns the first element of the queue.

Specified by:

first in interface PriorityQueue<java.lang.Double>

Returns:

the first element.

last

public java.lang.Double last()

Description copied from interface: PriorityQueue

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

Specified by:

last in interface PriorityQueue<java.lang.Double>

Returns:

the last element.