Bank1

Bank1:

 

package banking1;

//账户
public class Account {
    private double balance;// 账户余额

    public Account(double init_balance) {
        balance = init_balance;
    }

    public double getBlance() {
        return balance;
    }

    // 存钱
    public void deposit(double amt) {// amt 要存的额度
        balance += amt;
    }

    // 取钱
    public void withdraw(double amt) {// amt：要取得额度
        if (balance >= amt) {
            balance -= amt;
        } else {
            System.out.println("余额不足");
        }
    }
}

 

TestBanking1:

/*
 * This class creates the program to test the banking classes.
 * It creates a new Bank, sets the Customer (with an initial balance),
 * and performs a series of transactions with the Account object.
 */
package TestBanking;

import banking1.Account;

public class TestBanking1 {
    public static void main(String[] args) {
        Account account;

        // Create an account that can has a 500.00 balance.
        account = new Account(500.00);
        System.out.println("Creating an account with a 500.00 balance.");

        // code
        account.withdraw(150);
        System.out.println("Withdraw 150.00");
        // code
        account.deposit(22.50);
        System.out.println("Deposit 22.50");

        // code
        account.withdraw(47.62);
        System.out.println("Withdraw 47.62");
        // code
        // Print out the final account balance
        System.out.println("The account has a balance of " + account.getBlance());
    }
}


输出结果：

Creating an account with a 500.00 balance.
Withdraw 150.00
Deposit 22.50
Withdraw 47.62
The account has a balance of 324.88