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JavaʵÏÖÑ­»·¶ÓÁÐ

import java.io.*;
public class QueueArray {  
    Object[] a; //¶ÔÏóÊý×飬¶ÓÁÐ×î¶à´æ´¢a.length-1¸ö¶ÔÏó  
    int front;  //¶ÓÊ×ϱꠠ
    int rear;   //¶Óβϱꠠ
    public QueueArray(){  
        this(10); //µ÷ÓÃÆäËü¹¹Ôì·½·¨  
    }  
    public QueueArray(int size){  
        a = new Object[size];  
        front = 0;  
        rear =0;  
    }  
    /** 
     * ½«Ò»¸ö¶ÔÏó×·¼Óµ½¶ÓÁÐβ²¿ 
     * @param obj ¶ÔÏó 
     * @return ¶ÓÁÐÂúʱ·µ»Øfalse,·ñÔò·µ»Øtrue 
     */ 
    public boolean enqueue(Object obj){  
        if((rear+1)%a.length==front){  
            return false;  
        }  
        a[rear]=obj;  
        rear = (rear+1)%a.length;  
        return true;  
    }  
    /** 
     * ¶ÓÁÐÍ·²¿µÄµÚÒ»¸ö¶ÔÏó³ö¶Ó 
     * @return ³ö¶ÓµÄ¶ÔÏ󣬶ÓÁпÕʱ·µ»Ønull 
     */ 
    public Object dequeue(){  
        if(rear==front){  
            return null;  


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