package com.wuming.syn; //不安全的取錢 //兩個人去銀行取錢，賬戶 public class UnSafeBank {public static void main(String[] args) {//賬戶Account account = new Account(100,"結婚基金");Drawing you = new Drawing(account,50,"你");Drawing girlFriend = new Drawing(account,100,"girlFriend");you.start();girlFriend.start();}} //賬戶 class Account{int money;//余額String name;//卡名public Account(int money, String name) {this.money = money;this.name = name;} }//銀行，模擬取款 class Drawing extends Thread{Account account;//賬戶//取了多少錢int drawingMoney;//現在手里有多少錢int nowMoney;public Drawing(Account account, int drawingMoney, String name) {super(name);//線程namethis.account = account;this.drawingMoney = drawingMoney;this.nowMoney = nowMoney;} //取錢@Overridepublic void run() {//判斷有沒有錢if(account.money-drawingMoney<0){System.out.println(Thread.currentThread().getName()+"錢不夠，取不了");return;}//卡內余額=余額-你取的錢account.money=account.money-drawingMoney;//你手里的錢nowMoney=nowMoney+drawingMoney;System.out.println(account.name+"余額為："+account.money);//Thread.currentThread().getName()=this.getName();System.out.println(this.getName()+"手里的錢"+nowMoney);} }

結婚基金余額為：50
你手里的錢50
girlFriend錢不夠，取不了

=================

模擬延時

package com.wuming.syn; //不安全的取錢 //兩個人去銀行取錢，賬戶 public class UnSafeBank {public static void main(String[] args) {//賬戶Account account = new Account(100,"結婚基金");Drawing you = new Drawing(account,50,"你");Drawing girlFriend = new Drawing(account,100,"girlFriend");you.start();girlFriend.start();}} //賬戶 class Account{int money;//余額String name;//卡名public Account(int money, String name) {this.money = money;this.name = name;} }//銀行，模擬取款 class Drawing extends Thread{Account account;//賬戶//取了多少錢int drawingMoney;//現在手里有多少錢int nowMoney;public Drawing(Account account, int drawingMoney, String name) {super(name);//線程namethis.account = account;this.drawingMoney = drawingMoney;this.nowMoney = nowMoney;} //取錢@Overridepublic void run() {//判斷有沒有錢if(account.money-drawingMoney<0){System.out.println(Thread.currentThread().getName()+"錢不夠，取不了");return;}//sleep可以放大問題的發生性try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}//卡內余額=余額-你取的錢account.money=account.money-drawingMoney;//你手里的錢nowMoney=nowMoney+drawingMoney;System.out.println(account.name+"余額為："+account.money);//Thread.currentThread().getName()=this.getName();System.out.println(this.getName()+"手里的錢"+nowMoney);} }

結婚基金余額為：0
girlFriend手里的錢100
結婚基金余額為：-50
你手里的錢50

總結

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