Package it.unimi.dsi.fastutil

Class PriorityQueues.SynchronizedPriorityQueue<K>

java.lang.Object

it.unimi.dsi.fastutil.PriorityQueues.SynchronizedPriorityQueue<K>

All Implemented Interfaces:

PriorityQueue<K>, java.io.Serializable

Enclosing class:

PriorityQueues

public static class PriorityQueues.SynchronizedPriorityQueue<K>
extends java.lang.Object
implements PriorityQueue<K>, java.io.Serializable

A synchronized wrapper class for priority queues.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static long	serialVersionUID

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.
java.util.Comparator<? super K>	comparator()	Returns the comparator associated with this queue, or null if it uses its elements' natural ordering.
K	dequeue()	Dequeues the first element from the queue.
void	enqueue(K x)	Enqueues a new element.
boolean	equals(java.lang.Object o)
K	first()	Returns the first element of the queue.
int	hashCode()
boolean	isEmpty()	Checks whether this queue is empty.
K	last()	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.
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Method Detail

enqueue

public void enqueue(K x)

Description copied from interface: PriorityQueue

Enqueues a new element.

Specified by:

enqueue in interface PriorityQueue<K>

Parameters:

x - the element to enqueue.

dequeue

public K dequeue()

Description copied from interface: PriorityQueue

Dequeues the first element from the queue.

Specified by:

dequeue in interface PriorityQueue<K>

Returns:

the dequeued element.

first

public K first()

Description copied from interface: PriorityQueue

Returns the first element of the queue.

Specified by:

first in interface PriorityQueue<K>

Returns:

the first element.

last

public K last()

Description copied from interface: PriorityQueue

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:

last in interface PriorityQueue<K>

Returns:

the last element.

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<K>

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<K>

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<K>

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<K>

comparator

public java.util.Comparator<? super K> comparator()

Description copied from interface: PriorityQueue

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

Specified by:

comparator in interface PriorityQueue<K>

Returns:

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object