实现接口Runnable类（线程）

package bao7;

public class TextMaiPiao
{

    public static void main(String[] args)
    {
        //买票
        MaiPiao mp=new MaiPiao();
        //启动第一个窗口
        Thread t1=new Thread(mp,"窗口一");
        t1.start();
        
        //启动第二个窗口
        Thread t2=new Thread(mp,"窗口二");
        t2.start();
        
        //启动第三个窗口
        Thread t3=new Thread(mp,"窗口三");
        t3.start();
    }

}

package bao7;

public class MaiPiao implements Runnable
{
    int piaos=10;
    @Override
    public void run() 
    {
        maiPiao();

    }
    
    public void maiPiao()
    {
        
        while(true)
        {
        //同步标志
        Object mutex="";
        //同步块
        synchronized (mutex) 
        {
            if(piaos>0)
            {
            try 
            {
                Thread.sleep(1000);
            } 
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
            
            piaos--;
            System.out.println(Thread.currentThread().getName()+"剩余票数="+piaos);
            }
        }
        }
    }

}