Java基础面试操作题：线程同步代码块 两个客户往一个银行存钱，

package com.swift;public class Bank_Customer_Test {    public static void main(String[] args) {        /*         * 两个客户往一个银行存钱，每人存三十次一次存一百。 模拟银行存钱功能，时时银行现金数。         */        Customer customer = new Customer();        new Thread(customer, "zhangsan").start();        new Thread(customer, "lisi").start();    }}class Bank {    private static int sum = 0;    public void setSum(int money) {        sum = sum + money;        System.out.println(Thread.currentThread().getName()+"存钱 ："+money+" 银行共有资金： "+sum);    }}class Customer implements Runnable {    private Bank bank = new Bank();    public void run() {        for (int i = 0; i < 30; i++) {            synchronized("lock") {                bank.setSum(100);            }        }    }}

问候不一定要慎重其事，但一定要真诚感人