用java来实现一个简答的银行转账问题？

[云计算-魏军]

用Java来实现一个简单的银行转账问题

[qybao]

for example

class Account {
    String name;
    double balance;

    public Account(String name) {
        this.name = name;
    }
    public Account(String name, double balance) {
        this.name = name;
        this.balance = balance;
    }
    public String getName() {return name;}

    public double getBalnace() {return balance;}

    public synchronized double take(double money) { //可以根据情况决定是否抛出异常
        if (balance >= money) {
            balance -= money;
            return money;
        }
        money = balance;
        balance = 0;
        return money;
    }

    public synchronized void save(double money) { //可以根据情况决定是否抛出异常
        if (money < 0) {
            return;
        }
        balance += money;        
    }
}

public class ATM {
    public static void main(String[] args) {
        Account a1 = new Account("a1", 5000);
        Account a2 = new Account("a2", 3000);

        transfer(a1, a2, 3000);
        transfer(a2, a1, 10000);
    }

    public static boolean transfer(Account from, Acctount to, double money) {
        if (moeny > from.getBalance()) {
            System.out.printf("Account %s has no enough money to transfer.\n", from.getName());
            return false;
        }
        to.save(from.take(money));
        System.out.printf(Account %s transfers money[%.2f] to account %s.\n", from.getName(), money, to.getName());
        return true;
    }
}

[牙痴]

线程一下。。。