多线程加锁二

package cn.mutipart.thd;

public class Test02 {
    public static void main(String[] args) {
        MyPainter p = new MyPainter();
        new Thread(){
            public void run() {
                while(true){
                    try {
                        Thread.sleep(20);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    p.print1();
                }
            };
        }.start();
        
        new Thread(){
            public void run() {
                while(true){
                    try {
                        Thread.sleep(5);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    p.print2();
                }
            };
        }.start();
    }
}

class MyPainter {
    
    private String lock  = new String("线程锁");

    public void print1(){
        synchronized (lock) {
            System.out.print("[不");
            System.out.print("是");
            System.out.print("广");
            System.out.print("告]");
            System.out.println();
        }
    }

    public void print2(){
        synchronized (lock) {
            System.out.print("[X");
            System.out.print("X");
            System.out.print("X");
            System.out.print("X]");
            System.out.println();
        }
    }
}