关于java 线程的停止同时用 interrupt 和 join 的作用
/**
* @FileName: ThreadTest.java
* @Description:
* @Author : xingchong
* @CreateTime: Sep 22, 2018 12:01:01 PM
* @Copyright: 超火影游 Copyright (c) 2017
* @Version: 1.0
*/
public class ThreadTest implements Runnable {
private boolean stop = false;
private Thread thread;
private int flag;
public ThreadTest(){
this.thread = new Thread(this, ThreadTest.class.getSimpleName());
this.flag = 0;
}
private String getName(){
return "["+Thread.currentThread().getName()+"] ";
}
/*
* (non-Javadoc)
*
* @see java.lang.Runnable#run()
*/
@Override
public void run() {
while(!stop){
System.out.println(this.getName() +", i am running..."+ this.flag++);
if(this.flag > 30){
break;
}
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println(this.getName()+", i am end...");
}
public synchronized void start(){
this.thread.start();
}
public synchronized void stop(){
System.out.println(this.getName() +", stop the thread...");
this.stop = true;
this.thread.interrupt();//马上中断 thread 正在进行的 sleep 等操作，而让停止操作立即执行
//若没有上面interrupt()方法，会导致 thread 发呆在 sleep ,担耽时机
try {
this.thread.join();//为了现在马上转入 thread 线程，以触发this.stop引起的停止操作，而不用再让main线程抢 CPU，担耽时机
} catch (InterruptedException e) {
e.printStackTrace();
}
//若没有上面的 join()方法，会导致以下代码在停止前执行
for (int i = 0; i < 3; i++) {
System.out.println(this.getName() +"in stop ...");
}
}
public static void main(String[] args) {
ThreadTest threadTest = new ThreadTest();
threadTest.start();
for (int i = 0; i < 3; i++) {
System.out.println(threadTest.getName()+", main...." + i);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
threadTest.stop();
System.out.println(threadTest.getName()+", main is end...");
}
}
