通过接口解决多线程下的数据同步问题

package com.test;

public class Test {
public static void main(String[] args) {
//定义三个售票窗口
TicKetWindow tw1=new TicKetWindow();

Thread t1 =new Thread(tw1);
Thread t2 =new Thread(tw1);
Thread t3 =new Thread(tw1);

t1.start();
t2.start();
t3.start();
}

}
class  TicKetWindow implements Runnable{
//一共2000张票
private  int nums=2000;

public void run(){
while(true){

synchronized(this){
//判断是否有票
if(nums>0){
//显示售票信息
//Thread.currentThread().getName() 显示当前线程
System.out.println(Thread.currentThread().getName()+"在售出第"+nums+"张票");
//出票速度是1秒一张
try{
Thread.sleep(1000);
}catch(Exception e){
e.printStackTrace();
}
nums--;
}else {
System.out.println("售票结束");
break;
}

}
}
}
}