简单的小程序实现ATM机操作

简单的小程序实现ATM机操作

代码如下：

package Day06;

import java.util.Scanner;

public class TestAccount {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Account[] accountArray = new Account[3];
for (int i = 0; i < accountArray.length; i++) {
accountArray[i] = new Account(i, 0.0);
}
boolean loopFlag = true;
while (loopFlag) {
loopFlag = printAccount(sc, accountArray);
}
}
/**
* 用来模拟ATM机打印的主方法
* @param sc
* @param accountArray
* @return
*/
private static boolean printAccount(Scanner sc, Account[] accountArray) {
boolean loopFlag = true;
System.out.println("Enter an id: ");
int id = -1;
if (sc.hasNextInt()) {
id = sc.nextInt();
}
int index = -1;
for (int i = 0; i < accountArray.length; i++) {
if (accountArray[i].getId() == id) {
index = i;
}
}
if (index >= 0) {
System.out.println("Main menu ");
System.out.println("1: check balance");
System.out.println("2: withdraw");
System.out.println("3: deposit");
System.out.println("4: exit");
System.out.print("Enter a choice:");
if (sc.hasNextInt()) {
id = sc.nextInt();
}
switch (id) {
case 1:
System.out.println("the balance is " + accountArray[index].getAccount());
break;
case 2:
accountArray[index].setAccount(accountArray[index].getAccount() - 100);
break;
case 3:
accountArray[index].setAccount(accountArray[index].getAccount() + 100);
break;
case 4:
loopFlag = false;
break;
default:
loopFlag = false;
break;
}
}
return loopFlag;
} }
第二部分
package Day06;

public class Account {
private int id;
private double account;

/**
*
*/
public Account() {

} /**
* @param id
* @param account
*/
public Account(int id, double account) {
this.id = id;
this.account = account;
}

/**
* @return the id
*/
public int getId() {
return this.id;
}
/**
* @param id the id to set
*/
public void setId(int id) {
this.id = id;
}
/**
* @return the account
*/
public double getAccount() {
return this.account;
}
/**
* @param account the account to set
*/
public void setAccount(double account) {
this.account = account;
}


}