Java多线程同步示例（银行卡存取款）

Bank类，定义账号、账号余额属性，定义存款方法与取款方法并上同步

1package person.xsc.practice;
2import java.util.Scanner;
3public class Bank {
4	private String account;// 账号
5	private int balance;// 账户余额
6	public Bank(String account, int balance) {
7		this.account = account;
8		this.balance = balance;
9	}
10	public String getAccount() {
11		return account;
12	}
13	public void setAccount(String account) {
14		this.account = account;
15	}
16	public int getBalance() {
17		return balance;
18	}
19	public void setBalance(int balance) {
20		this.balance = balance;
21	}
22	@Override
23	public String toString() {
24		return "Bank [账号：" + account + ", 余额：" + balance + "]";
25	}
26	// 存款
27	public synchronized void saveAccount() {
28		// 获取当前的账号余额
29		int balance = getBalance();
30		// 修改余额
31		balance +=100;
32		// 修改账户余额
33		setBalance(balance);
34		// 输出存款后的账户余额
35		System.out.println(account+"存款后的账户余额为：" + balance);
36	}
37
38	public synchronized void drawAccount() {
39			// 获得当前的帐户余额
40			int balance = getBalance();
41			// 修改余额
42			balance = balance - 200;
43			// 修改帐户余额
44			setBalance(balance);
45			System.out.println(account+"取款后的帐户余额：" + balance);
46	}
47}
48

取款线程

1package person.xsc.practice;
2//取款
3public class DrawAccount implements Runnable{
4	Bank bank;
5	public DrawAccount(Bank bank){
6		this.bank=bank;
7	}
8	@Override
9	public void run() {
10		bank.drawAccount();
11	}
12	
13}
14

存款线程

1package person.xsc.practice;
2//存款
3public class SaveAccount implements Runnable{
4	Bank bank;
5	public SaveAccount(Bank bank){
6		this.bank=bank;
7	}
8	public void run(){
9		bank.saveAccount();
10	}
11}
12

测试类

1package person.xsc.practice;
2public class Test {
3	public static void main(String[] args) {
4		// 创建帐户，给定余额为1000
5		Bank bank=new Bank("1001",1000);
6		//创建线程对象
7		SaveAccount sa=new SaveAccount(bank);
8		DrawAccount da=new DrawAccount(bank);
9		Thread save=new Thread(sa);
10		Thread draw=new Thread(da);
11		save.start();
12		draw.start();
13		try {
14			save.join();
15			draw.join();
16		} catch (InterruptedException e) {
17			// TODO Auto-generated catch block
18			e.printStackTrace();
19		}
20		System.out.println(bank);
21	}
22
23}
24

输出

11001存款后的账户余额为：1100
21001取款后的帐户余额：900
3Bank [账号：1001, 余额：900]
4