FixedSizeIntegerQueue (JGraphT : a free Java graph library)

java.lang.Object
- org.jgrapht.alg.util.FixedSizeIntegerQueue

```
public final class FixedSizeIntegerQueue
extends java.lang.Object
```
Primitive but efficient implementation of a fixed size queue for integers. Note: this queue is not implemented as a ring, so at most $N$ enqueue operations are allowed, where $N$ is the maximum capacity of the queue! After that, queue.clear() must be invoked.

Author:

Joris Kinable

Constructor Summary

Constructors
Constructor Description

FixedSizeIntegerQueue(int capacity)
Create a queue of fixed size.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Empty the queue.
`void`	`enqueue(int e)`	Add an element to the queue.
`boolean`	`isEmpty()`	Check if the queue has any items.
`int`	`poll()`	Poll the first element from the queue.
`int`	`size()`	Returns the number of items in the queue.
`java.lang.String`	`toString()`	Returns a textual representation of the queue.

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

- Constructor Detail
  - FixedSizeIntegerQueue
```
public FixedSizeIntegerQueue(int capacity)
```
    Create a queue of fixed size.
    
    Parameters:
    
    capacity - size of the queue
- Method Detail
  - enqueue
```
public void enqueue(int e)
```
    Add an element to the queue.
    
    Parameters:
    
    e - element
  - poll
```
public int poll()
```
    Poll the first element from the queue.
    
    Returns:
    
    the first element.
  - isEmpty
```
public boolean isEmpty()
```
    Check if the queue has any items.
    
    Returns:
    
    true if the queue is empty
  - size
```
public int size()
```
    Returns the number of items in the queue.
    
    Returns:
    
    number of items in the queue
  - clear
```
public void clear()
```
    Empty the queue.
  - toString
```
public java.lang.String toString()
```
    Returns a textual representation of the queue.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    a textual representation of the queue.