public class Demo07 {
    public static void main(String[] args) {
        final Printer p = new Printer();
        new Thread() {
            public void run() {
                while (true) {
                    p.print1();
                }
            }
        }.start();
    }

    static class Printer {
        Demo01 d = new Demo01();
 

        public void print1() {
            synchronized (d) {              //鎖物件不能用匿名物件，因為匿名物件不是同一個物件;同步程式碼塊 ，鎖機制，鎖物件可以是任意的物件。
                System.out.print("黑");
                System.out.print("馬");
                System.out.print("程");
                System.out.print("序");
                System.out.print("員");
 
                System.out.print("\r\n");
            }
        }

        public void print2() {
            synchronized (d) {
                System.out.print("傳");
                System.out.print("智");
                System.out.print("播");
                System.out.print("客");
                System.out.print("\r\n");
 
            }
        }

    }
}