JAVA基础第六天

单用户ATM模拟程序：

import javax.swing.JOptionPane;

public class ATM {

public static int money =8000; //银行卡里面现有的金额为8000

public static void main(String[] args) {

JOptionPane.showMessageDialog(null, "欢迎光临，工商银行");

boolean land = denglu();{

if(land==false){

JOptionPane.showMessageDialog(null, "非法用户");

System.exit(0);

}

}

while(true){

String s =JOptionPane.showInputDialog(null,"1、存款"+"\n"+"2、取款"+"\n"+"3、查询余额"+"\n"+"4、取卡");

int item =Integer.parseInt(s);

switch (item) {

case 1:

cunkuan();

break;

case 2:

qukuan();

break;

case 3:

cxye();

break;

case 4:

JOptionPane.showMessageDialog(null, "谢谢使用");

System.exit(0);

break;

default:

JOptionPane.showMessageDialog(null, "非法输入，请输入1-4");

break;

}

}

}

/*

* 登陆框

* 登陆是否成功

* */

public static boolean denglu(){

for(int i=0;i<3;i++){

String card =JOptionPane.showInputDialog(null,"请输入卡号");

String psw = JOptionPane.showInputDialog(null,"请输入密码");

if(card.equals("123456")&& psw.equals("aaaaaa")){

return true;

}

}

return false;

}

/*

* 查询余额

* */

public static void cxye(){

JOptionPane.showMessageDialog(null, "账号余额："+money);

}

/*

* 存款

* */

public static void cunkuan(){

String x = JOptionPane.showInputDialog(null,"请输入存入的金额：");

int m = Integer.parseInt(x);

money = money+m;

String str =JOptionPane.showInputDialog(null, "是否显示余额？ y/n");

if(str.equals("y")){

cxye();

}

}

/*

* 取款

* */

public static void qukuan(){

String y =JOptionPane.showInputDialog(null,"请输入取款金额");

int s =Integer.parseInt(y);

if(money<s){

JOptionPane.showMessageDialog(null, "余额不足，请重新输入");

}

else{

money =money -s;

String str =JOptionPane.showInputDialog(null, "是否显示余额？y/n");

if(str.equals("y")){

cxye();

}

}

}

}

2、多用户ATM机模拟程序：

import javax.swing.JOptionPane;

public class DyhATM {

public static String[] code ={"123456","21323","23256","12313"};

public static String[] pwd ={"aaa","bbb","ccc","ddd"};

public static int[] money={5000,6000,4000,2000};

//记录用户登陆系统的下标

public static int c=-1;

public static void main(String[] aaa){

JOptionPane.showMessageDialog(null, "欢迎光临，工商银行");

denglu();

if(c==-1){

JOptionPane.showMessageDialog(null, "非法用户");

System.exit(0);

}

while(true){

String s =JOptionPane.showInputDialog(null,"1、存款"+"\n"+"2、取款"+"\n"+"3、查询余额"+"\n"+"4、取卡");

int item =Integer.parseInt(s);

switch (item) {

case 1:

cunkuan();

break;

case 2:

qukuan();

break;

case 3:

cxye();

break;

case 4:

JOptionPane.showMessageDialog(null, "谢谢使用");

System.exit(0);

break;

default:

JOptionPane.showMessageDialog(null, "非法输入，请输入1-4");

break;

}

}

}

//登陆界面

public static void denglu(){

for(int i=0;i<3;i++){

String a =JOptionPane.showInputDialog(null,"请输入卡号");

String b = JOptionPane.showInputDialog(null,"请输入密码");

for(int x=0;x<code.length;x++){

if(a.equals(code[x]) && b.equals(pwd[x])){

c=x;

return;

}

}

}

}

//查询界面

public static void cxye(){

JOptionPane.showMessageDialog(null, "账号余额："+money[c]);

}

//存款界面

public static void cunkuan(){

String x = JOptionPane.showInputDialog(null,"请输入存入的金额：");

int m = Integer.parseInt(x);

money[c] = money[c]+m;

String str =JOptionPane.showInputDialog(null, "是否显示余额？ y/n");

if(str.equals("y")){

cxye();

}

}

public static void qukuan(){

String y =JOptionPane.showInputDialog(null,"请输入取款金额");

int s =Integer.parseInt(y);

if(money[c]<s){

JOptionPane.showMessageDialog(null, "余额不足，请重新输入");

}

else{

money[c] =money[c] -s;

String str =JOptionPane.showInputDialog(null, "是否显示余额？y/n");

if(str.equals("y")){

cxye();

}

}

}

}