本文实例讲述了java数据结构与算法之双向循环队列的数组实现方法。分享给大家供大家参考，具体如下：
需要说明的是此算法我并没有测试过，这里给出的相当于伪代码的算法思想，所以只能用来作为参考！
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package source;
public class Deque {
private int maxSize;
private int left;
private int right;
private int nItems;
private long[] myDeque;
//constructor
public Deque(int maxSize){
this.maxSize = maxSize;
this.myDeque = new long[this.maxSize];
this.nItems = 0;
this.left = this.maxSize;
this.right = -1;
}
//insert a number into left side
public void insertLeft(long n){
if(this.left==0) this.left = this.maxSize;
this.myDeque[--this.left] = n;
this.nItems++;
}
//insert a number into right side
public void insertRight(long n){
if(this.right==this.maxSize-1) this.right = -1;
this.myDeque[++this.right] = n;
this.nItems++;
}
//remove from left
public long removeLeft(){
long temp = this.myDeque[this.left++];
if(this.left==this.maxSize) this.left = 0;
this.nItems--;
return temp;
}
//remove from right
public long removeRight(){
long temp = this.myDeque[this.right--];
if(this.left==-1) this.left = this.maxSize-1;
this.nItems--;
return temp;
}
//return true if deQue is empty
public boolean isEmpty(){
return (this.nItems==0);
}
//return size of the deQue
public int size(){
return this.nItems;
}
}
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PS：双向循环队列的用处很大，可以做为普通队列，也可以用来做栈来用！
希望本文所述对大家java程序设计有所帮助。