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Queue

时间:2018-02-20 23:06:06      阅读:223      评论:0      收藏:0      [点我收藏+]

 

queue: FIFO,

Queue is interface, the implementation could be LinkedList or array

offer, poll, peek, size() isEmpty()

public class QueueTest {
    public static void main(String[] args){
        Queue<Integer> queue = new LinkedList<>() ;
        queue.offer(5);
        queue.offer(3);
        System.out.println(queue.size()); //2
        System.out.println(queue.poll()); //5
        System.out.println(queue.peek()); //3
        System.out.println(queue.isEmpty()); //false
        System.out.println(queue.poll()); //3
        System.out.println(queue.isEmpty()); //true
    }
}

 

Queue

原文:https://www.cnblogs.com/davidnyc/p/8455966.html

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