[Java知识库]Java实现环形队列

使用Java语言设计一个环形队列

package Queue;
import java.io.*;
public class RingQueue {
	public static int front=-1,rear=-1,val;
	public static int queue[]=new int[5];
	public static void main(String args[]) throws IOException{
		String strM;
		BufferedReader keyin=new BufferedReader(new InputStreamReader(System.in));
		while(rear<5&&val!=-1) {
			System.out.println("请输入一个值以存入队列，要取出请输入0，结束输入-1：");
			strM=keyin.readLine();
			val=Integer.parseInt(strM);
			if(val==0) {
				if(front==rear) {
					System.out.println("队列已经空了");
					break;
				}
				front++;
				if(front==5) {
					front=0;
				
				}
				System.out.println("取出队列值:"+queue[front]);
				queue[front]=0;
				
			}else if(val!=-1&&rear<5) {
				if(rear+1==front||rear==4&&front<=0) {
					System.out.println("队列已经满了");
					break;
				}
				rear++;
				if(rear==5)
					rear=0;
				queue[rear]=val;
			}
		}
		System.out.println("队列剩余数据：");
		if(front==rear)
			System.out.println("队列已空");
		else {
			while(front!=rear) {
				front++;
				if(front==5)
					front=0;
				System.out.println(queue[front]);
				queue[front]=0;
			}
		}
		System.out.println();
	}
}