java面试题-用JAVA中的多线程示例银行取款问题标准版

package com.softeem.demo;

/**
* @authorleno 账户类 默认有余额，可以取款
*/
class Account2 {
private float balance = 1000;

public float getBalance() {
return balance;
}

public void setBalance(float balance) {
this.balance = balance;
}

/**
* 取款的方法需要同步
*
* @parammoney
*/
public synchronized void withdrawals(float money) {
if (balance >= money) {
System.out.println("被取走" + money + "元!");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
balance -= money;
} else {
System.out.println("对不起,余额不足!");
}
}

}

/**
* @authorleno 银行卡
*/
class TestAccount1 extends Thread {

private Account2 account;

public TestAccount1(Account2 account) {
this.account = account;
}

@Override
public void run() {
account.withdrawals(800);
System.out.println("余额为:" + account.getBalance() + "元!");
}
}

/**
* @authorleno 存折
*/
class TestAccount2 extends Thread {

private Account2 account;

public TestAccount2(Account2 account) {
this.account = account;
}

@Override
public void run() {
account.withdrawals(700);
System.out.println("余额为:" + account.getBalance() + "元!");
}
}

public class YinHang {
public static void main(String[] args) {
Account2 account = new Account2();
TestAccount1 testAccount1 = new TestAccount1(account);
testAccount1.start();
TestAccount2 testAccount2 = new TestAccount2(account);
testAccount2.start();
}
}