多线程lock锁示例

package thread;

import java.util.concurrent.locks.ReentrantLock;

/**
 * @auto dh
 * @create 2020-03-28-13:07
 */
class Account {
    private Double balance;
    private ReentrantLock lock=new ReentrantLock();
    public Account(Double balance) {
        this.balance = balance;
    }

    public void deposite(Double amt) {
        try {
            lock.lock();
            if (amt > 0) {
                balance += amt;
            }
            System.out.println(Thread.currentThread().getName() + ":存款成功,余额为" + balance);
        }finally {
            lock.unlock();
        }

    }
}

class Customer extends Thread {
    private Account account;

    public Customer(Account account) {
        this.account = account;

    }

    public void run() {
        for (int i = 0; i < 3; i++) {
            this.account.deposite(1000.0);

        }
    }
}

public class Thread005 {
    public static void main(String[] args) {
        Account account=new Account(0.0);
        Customer customerA=new Customer(account);
        Customer customerB=new Customer(account);
        customerA.setName("张三");
        customerB.setName("李四");
        customerA.start();
        customerB.start();

    }
}