java火车站卖票程序(线程等待)

  1 package com.java.thread.synch;
  2
  3 /**
  4  * 卖票演示
  5  * @author Administrator
  6  * 两个车站卖100张票
  7  */
  8 public class SellTicket {
  9     static Object obj=new Object();
 10     static int Count=100;
 11     public static void main(String[] args){
 12 //        StationOne one =new StationOne(obj);
 13 //        StationTwo two =new StationTwo(obj);
 14 //        Thread th1=new Thread(one);
 15 //        Thread th2=new Thread(two);
 16 //        th1.start();
 17 //        th2.start();
 18
 19         Thread th1=new Thread(new A());
 20         Thread th2=new Thread(new A());
 21         th1.setName("车站一");
 22         th2.setName("车站二");
 23         th1.start();
 24         th2.start();
 25     }
 26 }
 27
 28 class A implements Runnable{
 29 //    String obj=new String("aa");
 30     @SuppressWarnings("static-access")
 31     public void run(){
 32         String obj="aaa";//不能是String obj=new String("aa");aa存放在堆区
 33 //        有两个obj，但是它们都是指向同一个aaa,aaa存放在数据区 ,数据区只有一份拷贝
 34         while(true){
 35             synchronized (obj) {
 36                 if(SellTicket.Count>0){
 37                     try {
 38                         Thread.currentThread().sleep(30);
 39                     } catch (InterruptedException e) {
 40 //                        TODO Auto-generated catch block
 41                         e.printStackTrace();
 42                     }
 43 //                    System.out.printf("%s卖出了第%d张票\n",Thread.currentThread().getName(),SellTicket.Count);
 44                     System.out.println(Thread.currentThread().getName()+SellTicket.Count);
 45                     SellTicket.Count--;
 46                 }else{
 47                     break;
 48                 }
 49             }
 50
 51         }
 52     }
 53 }
 54
 55
 56 /**
 57  * 车站一
 58  * @author Administrator
 59  *
 60  */
 61 class StationOne implements Runnable{
 62     private Object obj;
 63     public StationOne(Object obj){
 64         this.obj=obj;
 65     }
 66     @SuppressWarnings("static-access")
 67     public void run() {
 68         synchronized(obj){
 69             while(SellTicket.Count>0){
 70                 obj.notify();
 71                 try {
 72                     Thread.currentThread().sleep(60);
 73                 } catch (InterruptedException e1) {
 74                     e1.printStackTrace();
 75                 }
 76                 System.out.printf("\t\t\t\t车站一卖出了第%d张票\n",SellTicket.Count);
 77                 SellTicket.Count--;
 78                 try {
 79                     obj.wait();
 80                 } catch (InterruptedException e) {
 81                     e.printStackTrace();
 82                 }
 83             }
 84             obj.notify();
 85         }
 86     }
 87 }
 88
 89 /**
 90  * 车站二
 91  * @author Administrator
 92  *
 93  */
 94 class StationTwo implements Runnable{
 95     private Object obj;
 96     public StationTwo(Object obj){
 97         this.obj=obj;
 98     }
 99     @SuppressWarnings("static-access")
100     public void run() {
101         synchronized(obj){
102             while(SellTicket.Count>0){
103                 obj.notify();
104                 try {
105                     Thread.currentThread().sleep(60);
106                 } catch (InterruptedException e1) {
107                     e1.printStackTrace();
108                 }
109                 System.out.printf("车站二卖出了第%d张票\n",SellTicket.Count);
110                 SellTicket.Count--;
111                 try {
112                     obj.wait();
113                 } catch (InterruptedException e) {
114                     e.printStackTrace();
115                 }
116             }
117             obj.notify();
118         }
119     }
120 }