|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectit.unimi.dsi.fastutil.AbstractPriorityQueue<Double>
it.unimi.dsi.fastutil.doubles.AbstractDoublePriorityQueue
it.unimi.dsi.fastutil.doubles.DoubleArrayFIFOQueue
public class DoubleArrayFIFOQueue
A type-specific array-based FIFO queue.
Instances of this class represent a FIFO using a backing
array in a circular way. The array is
enlarged as needed, but it is never shrunk. Use the trim()
method
to reduce its size, if necessary.
Field Summary | |
---|---|
protected double[] |
array
The backing array. |
protected int |
end
The end position in array . |
static int |
INITIAL_CAPACITY
The standard initial capacity of a queue. |
protected int |
length
The current (cached) length of array . |
protected int |
start
The start position in array . |
Constructor Summary | |
---|---|
DoubleArrayFIFOQueue()
Creates a new empty queue with standard initial capacity. |
|
DoubleArrayFIFOQueue(int capacity)
Creates a new empty queue with given capacity. |
Method Summary | |
---|---|
void |
clear()
Removes all elements from this queue. |
DoubleComparator |
comparator()
Returns null (FIFO queues have no comparator). |
double |
dequeueDouble()
Dequeues the first element from the queue. |
void |
enqueue(double x)
Enqueues a new element. |
double |
firstDouble()
Returns the first element of the queue. |
double |
lastDouble()
Returns the last element of the queue. |
int |
size()
Returns the number of elements in this queue. |
void |
trim()
Trims the queue to the smallest possible size. |
Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDoublePriorityQueue |
---|
dequeue, enqueue, first, last |
Methods inherited from class it.unimi.dsi.fastutil.AbstractPriorityQueue |
---|
changed, isEmpty |
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 |
---|
changed, isEmpty |
Field Detail |
---|
public static final int INITIAL_CAPACITY
protected double[] array
protected int length
array
.
protected int start
array
.
protected int end
array
. Might be actually smaller than start
because array
is used cyclically.
Constructor Detail |
---|
public DoubleArrayFIFOQueue(int capacity)
capacity
- the initial capacity of this queue.public DoubleArrayFIFOQueue()
Method Detail |
---|
public DoubleComparator comparator()
null
(FIFO queues have no comparator).
null
.PriorityQueue.comparator()
public double dequeueDouble()
DoublePriorityQueue
public void enqueue(double x)
DoublePriorityQueue
x
- the element to enqueue.public double firstDouble()
public double lastDouble()
lastDouble
in interface DoublePriorityQueue
lastDouble
in class AbstractDoublePriorityQueue
public void clear()
PriorityQueue
public void trim()
public int size()
PriorityQueue
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |