Java多线程中的延时队列DelayQueue

慢慢进入JAVA的内心世界，

今天也一直在和JAVA的语法作斗争，

到周三，写的一个基于SPRING BOOT的日志小模块，

成型啦~~

关于DelayQueue，书上是这样说的：

Student.java

package demo.thread;

import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;

public class Student implements Delayed{
	
	private String name;
	private long workTime;
	private long submitTime;
	
	public String getName() {
		return this.name + "交卷，用时  " + workTime;
	}
	
	public Student(String name, long submitTime) {
		this.name = name;
		this.workTime = submitTime;
		this.submitTime = TimeUnit.NANOSECONDS.convert(submitTime, TimeUnit.MILLISECONDS ) 
				+ System.nanoTime();
		System.out.println(this.name + " 交卷， 用时 " + workTime);
	}

	@Override
	public int compareTo(Delayed o) {
		// TODO Auto-generated method stub
		Student that = (Student) o;
		return submitTime > that.submitTime? 1 :(submitTime < that.submitTime ? -1 :0);
	}

	@Override
	public long getDelay(TimeUnit unit) {
		// TODO Auto-generated method stub
		return unit.convert(submitTime - System.nanoTime(), unit.NANOSECONDS);
	}

}

ThreadMain.java

package demo.thread;

import java.util.concurrent.DelayQueue;

public class ThreadMain {

	public static void main(String[] args) throws Exception {
		final DelayQueue<Student> bq = new DelayQueue<Student>();
		for (int i = 0; i < 5; i++) {
			Student student = new Student("学生" + i, Math.round((Math.random()*10 + i)));
			bq.put(student);
		}
		System.out.println("bq.peek();" + bq.peek().getName());
	}
}

输出样子：