同步机制的练习

有一个余额为3000的账户，现有2个渠道同时存钱，共存6次，打印每次存钱的余额。

package com.yby7;

//分析问题
//1：是否为多线程？    -->多线程
//2：是否有共享数据？  -->线程安全问题  -->同步机制

import java.util.concurrent.locks.ReentrantLock;

class Account implements Runnable{
    private int balance = 3000;
    private int cnt = 1;
    private ReentrantLock lock = new ReentrantLock();

    @Override
    public void run() {
        while (true) {
            try {
                lock.lock();
                if (cnt <= 6) {
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    balance += 1000;
                    cnt ++;
                    System.out.println("当前余额为："+balance);
                }else{
                    break;
                }
            }finally {
                lock.unlock();
            }
        }
    }
}

public class AccountTest {
    public static void main(String[] args) {
        Account p = new Account();

        Thread t1 = new Thread(p);
        Thread t2 = new Thread(p);

        t1.setName("窗口1");
        t2.setName("窗口2");

        t1.start();
        t2.start();
    }
}