线程Join()

public class TestJoin {
	public static void main(String[] args) {
		Runnable3 r3 = new Runnable3();
		Thread t = new Thread(r3);
		t.start();

		try {
			t.join();//合并某个线程  等子线程执行完后再执行此代码后的代码，类似方法调用
		} catch (InterruptedException e) {

			e.printStackTrace(); 
		} 
		for(int i=0;i<10;i++) {
			System.out.println("i am main thread");
		}
	}

}

public class Runnable3 implements Runnable{

	public void run(){
		for(int i=0;i<10;i++) {
			System.out.println("i am" + Thread.currentThread().getName());

			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				return;
			}
		}
	}
}