Java 使用队列实现堆栈

import java.util.Deque;
  
/**
 * 使用队列实现自定义堆栈
 * 1、弹
 * 2、压
 * 3、获取头
 * @author Administrator
 *
 * @param <E>
 */
public class MyStack<E> {
       //容器
       private Deque<E> container =new ArrayDeque<E>();
       //容量
       private int cap;
       public MyStack(int cap) {
              super();
              this.cap = cap;
       }
       
       //压栈
       public boolean push(E e){
              if(container.size()+1>cap){
                     return false;
              }
              return container.offerLast(e);
              
       }
       //弹栈
       public E pop(){
              return container.pollLast();
       }
       //获取
       public E peek(){
              return container.peekLast();
       }
       
       public int size(){
              return this.container.size();       
       }
}
  
  
  
  
//测试自定义堆栈
public class Demo02 {
  
       /**
        * @param args
        */
       public static void main(String[] args) {
              MyStack<String> backHistory =new MyStack<String>(3);
              backHistory.push("www.baidu.com");
              backHistory.push("www.google.com");
              backHistory.push("www.sina.com");
              backHistory.push("www.bjsxt.cn");
              
              System.out.println("大小:"+backHistory.size());
              
              //遍历
              String item=null;
              while(null!=(item=backHistory.pop())){
                     System.out.println(item);
              }
       }
  
}

猜你喜欢

转载自blog.csdn.net/mengxianglong123/article/details/88290871