ObjectArrayPriorityQueue (object-queues 8.5.13-SNAPSHOT API)

java.lang.Object
- it.unimi.dsi.fastutil.objects.ObjectArrayPriorityQueue<K>

All Implemented Interfaces:

it.unimi.dsi.fastutil.PriorityQueue<K>, java.io.Serializable
```
public class ObjectArrayPriorityQueue<K>
extends java.lang.Object
implements it.unimi.dsi.fastutil.PriorityQueue<K>, java.io.Serializable
```
A type-specific array-based priority queue.
Instances of this class represent a priority queue using a backing array—all operations are performed directly on the array. The array is enlarged as needed, but it is never shrunk. Use the trim() method to reduce its size, if necessary.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`protected K[]`	`array` The backing array.
`protected java.util.Comparator<? super K>`	`c` The type-specific comparator used in this queue.
`protected int`	`firstIndex` The first index, cached, if `firstIndexValid` is true.
`protected boolean`	`firstIndexValid` Whether `firstIndex` contains a valid value.
`protected int`	`size` The number of elements in this queue.

Constructor Summary

Constructors
Constructor and Description
`ObjectArrayPriorityQueue()` Creates a new empty queue using the natural order.
`ObjectArrayPriorityQueue(java.util.Comparator<? super K> c)` Creates a new empty queue with a given comparator.
`ObjectArrayPriorityQueue(int capacity)` Creates a new empty queue with a given capacity and using the natural order.
`ObjectArrayPriorityQueue(int capacity, java.util.Comparator<? super K> c)` Creates a new empty queue with a given capacity and comparator.
`ObjectArrayPriorityQueue(K[] a)` Wraps a given array in a queue using the natural order.
`ObjectArrayPriorityQueue(K[] a, java.util.Comparator<? super K> c)` Wraps a given array in a queue using a given comparator.
`ObjectArrayPriorityQueue(K[] a, int size)` Wraps a given array in a queue using the natural order.
`ObjectArrayPriorityQueue(K[] a, int size, java.util.Comparator<? super K> c)` Wraps a given array in a queue using a given comparator.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`changed()`
`void`	`clear()`
`java.util.Comparator<? super K>`	`comparator()`
`K`	`dequeue()`
`void`	`enqueue(K x)`
`K`	`first()`
`int`	`size()`
`void`	`trim()` Trims the underlying array so that it has exactly `size()` elements.

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

Methods inherited from interface it.unimi.dsi.fastutil.PriorityQueue
isEmpty, last

- Field Detail
  - array
```
protected transient K[] array
```
    The backing array.
  - size
```
protected int size
```
    The number of elements in this queue.
  - c
```
protected java.util.Comparator<? super K> c
```
    The type-specific comparator used in this queue.
  - firstIndex
```
protected transient int firstIndex
```
    The first index, cached, if firstIndexValid is true.
  - firstIndexValid
```
protected transient boolean firstIndexValid
```
    Whether firstIndex contains a valid value.
- Constructor Detail
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(int capacity,
                                java.util.Comparator<? super K> c)
```
    Creates a new empty queue with a given capacity and comparator.
    
    Parameters:
    
    capacity - the initial capacity of this queue.
    
    c - the comparator used in this queue, or null for the natural order.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(int capacity)
```
    Creates a new empty queue with a given capacity and using the natural order.
    
    Parameters:
    
    capacity - the initial capacity of this queue.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(java.util.Comparator<? super K> c)
```
    Creates a new empty queue with a given comparator.
    
    Parameters:
    
    c - the comparator used in this queue, or null for the natural order.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue()
```
    Creates a new empty queue using the natural order.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(K[] a,
                                int size,
                                java.util.Comparator<? super K> c)
```
    Wraps a given array in a queue using a given comparator.
    The queue returned by this method will be backed by the given array.
    
    Parameters:
    
    a - an array.
    
    size - the number of elements to be included in the queue.
    
    c - the comparator used in this queue, or null for the natural order.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(K[] a,
                                java.util.Comparator<? super K> c)
```
    Wraps a given array in a queue using a given comparator.
    The queue returned by this method will be backed by the given array.
    
    Parameters:
    
    a - an array.
    
    c - the comparator used in this queue, or null for the natural order.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(K[] a,
                                int size)
```
    Wraps a given array in a queue using the natural order.
    The queue returned by this method will be backed by the given array.
    
    Parameters:
    
    a - an array.
    
    size - the number of elements to be included in the queue.
  - ObjectArrayPriorityQueue
```
public ObjectArrayPriorityQueue(K[] a)
```
    Wraps a given array in a queue using the natural order.
    The queue returned by this method will be backed by the given array.
    
    Parameters:
    
    a - an array.
- Method Detail
  - enqueue
```
public void enqueue(K x)
```
    Specified by:
    
    enqueue in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - dequeue
```
public K dequeue()
```
    Specified by:
    
    dequeue in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - first
```
public K first()
```
    Specified by:
    
    first in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - changed
```
public void changed()
```
    Specified by:
    
    changed in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - size
```
public int size()
```
    Specified by:
    
    size in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface it.unimi.dsi.fastutil.PriorityQueue<K>
  - trim
```
public void trim()
```
    Trims the underlying array so that it has exactly size() elements.
  - comparator
```
public java.util.Comparator<? super K> comparator()
```
    Specified by:
    
    comparator in interface it.unimi.dsi.fastutil.PriorityQueue<K>

Class ObjectArrayPriorityQueue<K>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface it.unimi.dsi.fastutil.PriorityQueue

Field Detail

array

size

c

firstIndex

firstIndexValid

Constructor Detail

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

ObjectArrayPriorityQueue

Method Detail

enqueue

dequeue

first

changed

size

clear

trim

comparator