子线程循环10次，接着主线程循环100次，接着又回到子线程循环10次，接着再回到主线程循环100次，如此循环50次（亲测可用）

package duoxiancheng;

public class MyThreadTest2 {

    public static void main(String[] args) throws InterruptedException{
        final MyService ms = new MyService();
        new Thread(new Runnable() {
            
            @Override
            public void run() {
                for(int i = 1; i <=50;i++){
                    ms.sub(i);
                }
                
            }
        }).start();
        
        //让子线程先跑
        Thread.sleep(1000);
        
        //main方法本身即为主线程
        for(int i = 1;i <= 50;i++){
            ms.main(i);
        }

    }
    
    static class MyService{
        
        boolean beShouldSub = true;//是否执行子线程标志位
        //子线程循环10次
        public synchronized void sub(int i) {
            if(!beShouldSub){
                try {
                    this.wait();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            for(int j =1;j<=10;j++){
                System.out.println("sub thread sequeue of " + j + "loop of " + i);
            }
            beShouldSub = false;//子线程执行完毕，子线程标志位设为false
            this.notify();//唤醒主线程
            
        }
        
        //主线程循环100次
        public synchronized void main(int i) {
            if(beShouldSub){
                try {
                    this.wait();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            for(int j = 1; j <= 100; j++){
                System.out.println("Main thread sequeue of " + j + "loop of " + i);
            }
            
            beShouldSub = true;//主线程执行完毕，子线程标志位设为true
            this.notify();//唤醒子线程
        }
        
    }

}