package com.bo.myThread.Demo02;

public class Demo implements Runnable {
    //100張票
  private int t=100;
    private Object obj=new Object();
    @Override
    public void run() {

        while(t>=0){
            synchronized (obj){//同步程式碼塊  裡面不能直接new Object 因為obj只有一份
                if (t<=0){
                break;
            }
            System.out.println(Thread.currentThread().getName()+"出售了第"+t+"張票");
            t--;
            }
        }
    }
}

package com.bo.myThread.Demo02;

public class TextDemo {
    public static void main(String[] args) {
        Demo demo=new Demo();
        //Runnable demo=new Runnable() {
            int t = 100;
            //public void run() {

                //while (true) {
                      //  if (t <= 0) {
                      //      break;
                      //  }
                      //  System.out.println(Thread.currentThread().getName()+"出售了第"+t+"張票");
                      //  t--;
                   // }
           // }


        //};
        Thread t1 =new Thread(demo,"視窗1");
        Thread t2 =new Thread(demo,"視窗2");
        Thread t3 =new Thread(demo,"視窗3");
        Thread t4 =new Thread(demo,"視窗4");
        t1.start();
        t2.start();
        t3.start();
        t4.start();
    }
}