public class Account {
    double balance;//存款初始金额
   
    /**
     * 存款
     * @param money
     */
    public void save(double money){
        balance += money;//累加
        System.out.println("你当前的余额：" + balance);
        System.out.println("存款成功");
    }
   
    /**
     * 取款
     * @param money
     */
    public void fetch(double money){
        if (balance > money) {
            balance -= money;//累减
            System.out.println("你当前的余额：" + balance);
            System.out.println("取款成功");
        }else{
            System.out.println("你当前的余额不足！");
        }
    }

}
这是测试类，我想实现存进去的钱，能够取出来，可是实现不了，求大神解决！
public class AccountTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Account r = new Account();
        Scanner input = new Scanner(System.in);
        System.out.println("1.存款     2.取款       0.退出");
        System.out.println("请选择你需要办理的业务：");
         int choice = input.nextInt();
         switch (choice) {
        case 1:
            System.out.println("请输入你的存款金额：");
            double amount = input.nextDouble();
            r.save(amount);
            break;
        case 2:
            System.out.println("请输入你的取款金额：");
            double amount1 = input.nextDouble();
            r.fetch(amount1);
            break;
        case 0:
            System.out.println("谢谢使用！");
            break;
            
            
        }

    }

}