7.加入线程

join()
当前线程暂停, 等待指定的线程执行结束后, 当前线程再继续
join(int)
可以等待指定的毫秒之后继续

public class Demo06Join {
    public static void main(String[] args) {
        final Thread t1 = new Thread("======t1======") {
            @Override
            public void run() {
                for(int i = 0; i < 1000; i++) {
                    System.out.println(getName());
                }
            }
        };
        Thread t2 = new Thread("t2") {
            @Override
            public void run() {
                for(int i = 0; i < 10; i++) {
                    if(i == 2) {
                        try {
                            System.out.println("线程t1插队执行");
                            //t1.join();
                            t1.join(1);                    //插队指定的时间,过了指定时间后,两条线程交替执行
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    System.out.println(getName());
                }
            }
        };
        t1.start();
        t2.start();
    }
}

t2
t2
线程======t1======插队执行
======t1======
======t1======
======t1======
======t1======
======t1======
......
......
......