public class ThreadTest extends Thread {

	private static boolean flag = false;
	
	public  ThreadTest() {
		System.out.println("threadID is :"+Thread.currentThread().getId());
		start();
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.out.println("main threadID is :"+Thread.currentThread().getId());
		ThreadTest test = new ThreadTest();
		try {
			sleep(1000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		synchronized (test) {
			test.notify();
		}
		try {
			sleep(1000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		synchronized (test) {
			test.notify();
			flag = true;
		}
	}
	
	public void threadStart() {
		if (!isAlive()) {
			start();
		}
	}
	
	@Override
	public void run() {

		while(true){
			try {
				System.out.println("threadID is :"+Thread.currentThread().getId());
				synchronized (this) {
					wait();
				}
				if (flag) {
					break;
				}
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}
 

我的做法是讓子執行緒迴圈執行前等待主執行緒的通知，當主執行緒發出通知後子執行緒才能繼續迴圈執行，每一次執行都需要等待，當然如果想結束子執行緒直接跳出迴圈就可以。

以上思路程式碼均為自己的理解，如有錯誤之處敬請各位大神予以斧正。