多线程 -- join

/*
join:
当A线程执行到了B线程的.join()方法时，A就会等待。等B线程都执行完，A才会执行。

join可以用来临时加入线程执行。

*/

class Demo implements Runnable
{
public void run()
{
for(int x=0; x<70; x++)
{
System.out.println(Thread.currentThread().toString()+"....."+x);
Thread.yield();
}
}
}

class  JoinDemo
{
public static void main(String[] args) throws Exception
{
Demo d = new Demo();
Thread t1 = new Thread(d);
Thread t2 = new Thread(d);
t1.start();

//t1.setPriority(Thread.MAX_PRIORITY);

t2.start();

//t1.join();

for(int x=0; x<80; x++)
{
//System.out.println("main....."+x);
}
System.out.println("over");
}
}