练习

/** * 问题: * 银行有一个账户。 * 有两个储户分别向同一个账户存3000元，每次存1000，存3次。每次存完打印账户余额。 * * @author 阿昌 * @create 2020-10-08 11:33 */ class Bank implements Runnable{ private double money = 0; private ReentrantLock lock =new ReentrantLock(); @Override public void run() { try { lock.lock(); for (int i = 0; i < 3; i++) { if ( i < 3){ money = money + 1000; System.out.println(Thread.currentThread().getName()+": 账户的余额为:"+ money ); } try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } finally { lock.unlock(); } } } public class BankDemo { public static void main(String[] args) { Bank b = new Bank(); Thread t1 = new Thread(b); Thread t2 = new Thread(b); t1.setName("储户1"); t2.setName("储户2"); t1.start(); t2.start(); } }