java 中Thread.join()的使用方法
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。
importjava.util.concurrent.TimeUnit;
/**
*6-13
*/
publicclassJoin{
publicstaticvoidmain(String[]args)throwsException{
Threadprevious=Thread.currentThread();
for(inti=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
Threadthread=newThread(newDomino(previous),String.valueOf(i));
thread.start();
previous=thread;
}
TimeUnit.SECONDS.sleep(5);
System.out.println(Thread.currentThread().getName()+"terminate.");
}
staticclassDominoimplementsRunnable{
privateThreadthread;
publicDomino(Threadthread){
this.thread=thread;
}
publicvoidrun(){
try{
thread.join();
}catch(InterruptedExceptione){
}
System.out.println(Thread.currentThread().getName()+"terminate.");
}
}
}
执行结果：
mainterminate. 0terminate. 1terminate. 2terminate. 3terminate. 4terminate. 5terminate. 6terminate. 7terminate. 8terminate. 9terminate.