java delay queue DelayQueue

1. Create an entity class that implements the interface Delayed

OrderInfo the implements the Serializable class public, the DelayedPause { 
    Private Long Final static serialVersionUID = 1L; 
    / ** 
     * Order number 
     * / 
    Private String orderNo; 
    / ** 
     * Order Status 
     * / 
    Private String Status; 
    / ** 
     * expiration time line 
     * / 
    Private exptime Long; 
    / ** 
     * order creation time 
     * / 
    Private Long createTime; 
　　// omitted set get method 
　　. . . . . . 


 　 @Override 
    public int the compareTo (the DelayedPause O) { 
        OrderInfo the orderInfo = (OrderInfo) O; 
        return orderInfo.getCreateTime () the compareTo (orderInfo.getExpTime ()).;
    } 

    / ** 
     * time unit: s 
     * = off-time delay expires - the current time 
     * / 
    @Override 
    public Long getDelay (TimeUnit Unit) { 
        return this.getExpTime () - System.currentTimeMillis (); 
    }

2. Write a test class

public class TestMain {
    public static void main(String[] args) throws InterruptedException {
        DelayQueue<OrderInfo> queue=new DelayQueue<>();
        OrderInfo orderInfo=new OrderInfo();
        orderInfo.setOrderNo("1");
        orderInfo.setStatus("test");
        orderInfo.setCreateTime(System.currentTimeMillis());
        System.out.println("加入队列时间====》》》"+new Date());
        orderInfo.setExpTime(System.currentTimeMillis()+20*1000);
        queue.put(orderInfo);

        while (true){
            OrderInfo take = queue.take();
            System.out.println(take);
            System.out.println("取出队列时间====》》》"+new Date());
        }
    }

　　Test Results