JAVA并发实现二（线程中止）

package com.subject01;

public class InterruptDemo {

public static void main(String[] args) {
SimpleThread st = new SimpleThread();
Thread t = new Thread(st);
t.start();
try {
Thread.sleep(2000);
}catch(InterruptedException e){
e.printStackTrace();
}
System.out.println("in main() - interrupting other thread");
//中断线程t
// 如果只是单纯的调用interrupt，线程并没有真正的终止，可搭配return进行使用
t.interrupt();
System.out.println("in main() - leaving");

System.out.println("================================");
System.out.println("测试isInterrupt:");
testIsinterrupt();
}

public static void testIsinterrupt(){

Thread t = Thread.currentThread();
// isInterrupted() 判断线程是否被中止，如果被中止则返回true,否则则范围false ;
System.out.println("A当前线程是否被中止："+t.isInterrupted());
t.interrupt();
System.out.println("B当前线程是否被中止:"+t.isInterrupted());
// 如果Thread.sleep()抛出异常，则会清除中止标识
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
System.out.println("C当前线程是否被中止:"+t.isInterrupted());
}
System.out.println("D当前线程是否被中止:"+t.isInterrupted());

}

}
class SimpleThread implements Runnable{

@Override
public void run() {
try {
System.out.println("in run() - about to sleep for 20 seconds");
Thread.sleep(20000);
System.out.println("in run() - woke up");
} catch (InterruptedException e) {
System.out.println("in run() - interrupted while sleeping");
//如果没有return，线程不会实际被中断，它会继续打印下面的信息
return ;
}
System.out.println("in run() - leaving normally");
}

}