java多线程总结三：sleep()、join()、interrupt()示例

2024-08-29 10:44:34

这是一个来自《java编程思想上的示例》

package demo.thread;
/**
*sleep()是静态方法，是属于类的，作用是让当前线程阻塞
*join()是使线程同步，如在某个线程里调用t.join()表示t线程执行完再执行当前线程
*interrupt()给线程设定一个标志表示该线程已被中断，但在异常捕获时将清理这个标志
*所以在catch子句中，该标志为false
*/
public class SleepJoinDemo {
public static void main(String[] args) {
Sleeper sleep1 = new Sleeper("sleep1", 1500);
Sleeper sleep2 = new Sleeper("sleep2", 1500);
Joiner join1 = new Joiner("join1", sleep1);
Joiner join2 = new Joiner("join2", sleep1);
sleep2.interrupt();
}
}
class Sleeper extends Thread {
// 可以传参设定睡眠时间
private int sleepTime;
public Sleeper(String name, int sleepTime) {
super(name);
this.sleepTime = sleepTime;
start();// 在构造方法中启动
}
@Override
public void run() {
try {
sleep(sleepTime);
} catch (InterruptedException e) {
System.out.println(getName() + " was interrupted.\n"
+ "isInterrupted():" + isInterrupted());
return;
}
System.out.println(getName() + " has awakened");
}
}
class Joiner extends Thread {
private Sleeper sleeper;
public Joiner(String name, Sleeper sleeper) {
super(name);
this.sleeper = sleeper;
start();
}
public void run() {
try {
sleeper.join();//合并，异步变同步
} catch (InterruptedException e) {
System.out.println("interrupted");
}
System.out.println(getName() + " join completed");
}
}

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