java 中Thread.join()的使用方法
如果一个线程A执行了thread.join()语句,其含义是:当前线程A等待thread线程终止之后才从thread.join()返回。
import java.util.concurrent.TimeUnit; /** * 6-13 */ public class Join { public static void main(String[] args) throws Exception { Thread previous = Thread.currentThread(); for (int i = 0; i < 10; i++) { // 每个线程拥有前一个线程的引用,需要等待前一个线程终止,才能从等待中返回 Thread thread = new Thread(new Domino(previous), String.valueOf(i)); thread.start(); previous = thread; } TimeUnit.SECONDS.sleep(5); System.out.println(Thread.currentThread().getName() + " terminate."); } static class Domino implements Runnable { private Thread thread; public Domino(Thread thread) { this.thread = thread; } public void run() { try { thread.join(); } catch (InterruptedException e) { } System.out.println(Thread.currentThread().getName() + " terminate."); } } }
执行结果:
main terminate. 0 terminate. 1 terminate. 2 terminate. 3 terminate. 4 terminate. 5 terminate. 6 terminate. 7 terminate. 8 terminate. 9 terminate.
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