怎么让一个线程先执行，后面线程再执行

public class ThreadTest {
	
	public static void main(String[] args) {
		MyThread myThread = new MyThread();
		myThread.start();
		try {
			myThread.join();        //主要是这个代码
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("现在到我了...");
	}
	
	private static class MyThread extends Thread{
		public void run(){
			int i = 50000;
			System.out.println("先执行...");
			while(i>0){
				i--;
			}
			System.out.println("执行完成！");
		}
	}
}

**主要是Thread.join()代码的问题