多线程的互斥同步(存款取款基础版)

 1 package com.thread;
 2 /**
 3  * 模拟同步取款的问题
 4  * @author dr
 5  *
 6  */
 7 public class ThreadTest {
 8     public static void main(String[] args) {
 9         final Account account = new Account();
10         //取出200
11         new Thread(new Runnable() {
12             @Override
13             public void run() {
14                 for(int i=0;i<3;i++){
15                     try {
16                         Thread.sleep(500);
17                     } catch (InterruptedException e) {
18                         // TODO Auto-generated catch block
19                         e.printStackTrace();
20                     }
21                     account.getMoney(200);
22                 }
23             }
24         }).start();
25         //存入300
26         new Thread(new Runnable() {
27             @Override
28             public void run() {
29                 for(int i=0;i<3;i++){
30                     try {
31                         Thread.sleep(500);
32                     } catch (InterruptedException e) {
33                         // TODO Auto-generated catch block
34                         e.printStackTrace();
35                     }
36                     account.setMoney(300);
37                 }
38             }
39         }).start();
40     }
41 }
42 class Account {
43     
44     private int balance = 1000;
45 
46     public synchronized void getMoney(int count){
47         
48         int result =balance - count;
49         if(result >= 0){
50             balance = result;
51             System.out.println(Thread.currentThread().getName()+"取出:"+count+"元，剩余："+balance);
52         }else{
53             System.out.println("余额不足...");
54         }
55     }
56     public synchronized void setMoney(int count){
57             
58             balance += count;
59             System.out.println(Thread.currentThread().getName()+"存入:"+count+"元，剩余："+balance);
60     }
61     
62 }