java 中Thread.join()的使用方法
如果一個線程A執行了thread.join()語句，其含義是：當前線程A等待thread線程終止之后才從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++) {
// 每個線程擁有前一個線程的引用，需要等待前一個線程終止，才能從等待中返回
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.");
}
}
}
執行結果：
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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