java充值余额代码 java话费充值代码
用java编译一段程序，包括开户，存款，取款，显示余额4个部分，急啊，若回答够快，可加分！急啊！！！
User.java
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public class User {
private String userName; // 账号
private double amount; // 金额
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public double getAmount() {
return amount;
}
public void setAmount(double amount) {
this.amount = amount;
}
}
BankService.java
import com.bank.po.User;
public interface BankService {
//用户选择操作类型
public void userChoose(String serialNumber);
//开户
public User addUser();
//存款
public User addAmount(User user);
//取款
public User withdrawal(User user);
//查询余额
public void lookBalance(User user);
}
BankServiceImpl.java
import com.bank.po.User;
import com.bank.service.BankService;
import com.bank.util.InputUtil;
public class BankServiceImpl implements BankService{
private static User user;
public void userChoose(String serialNumber){
System.out.println("Please choose the type of operation(Input serial number):");
System.out.println("1 : 开户(Add user)");
System.out.println("2 : 存款(deposit)");
System.out.println("3 : 取款(withdrawals)");
System.out.println("4 : 查询余额(Inquires the balance)");
serialNumber = InputUtil.input();
if("1".equalsIgnoreCase(serialNumber)){
user = addUser();
}else{
if(null != user){
if("2".equalsIgnoreCase(serialNumber)){
user = addAmount(user);
System.out.println("Deposit success !");
}
if("3".equalsIgnoreCase(serialNumber)){
user = withdrawal(user);
System.out.println("Withdrawals success !");
}
if("4".equalsIgnoreCase(serialNumber))
lookBalance(user);
else{
System.out.println("Input is wrong, please input anew !");
}
}else{
System.out.println("Please first open an account");
}
}
userChoose(null);
}
public User addUser() {
User user = new User();
System.out.println("Welcome to use: please first accounts !");
System.out.println("Please enter your user name :");
String userName = InputUtil.input();
System.out.println("Please input amount(please input digital) :");
String amount = InputUtil.input();
user.setUserName(userName);
user.setAmount(Double.parseDouble(amount));
return user;
}
public User addAmount(User user) {
System.out.println("Please input amount(please input digital) :");
String amount = InputUtil.input();
user.setAmount(user.getAmount() + Double.parseDouble(amount));
return user;
}
public User withdrawal(User user) {
System.out.println("Please input amount(please input digital) :");
String amount = InputUtil.input();
user.setAmount(user.getAmount() - Double.parseDouble(amount));
return user;
}
public void lookBalance(User user) {
System.out.println("Your balance for :" + user.getAmount());
}
}
InputUtil.java
public class InputUtil {
public static String input(){
Scanner sc = new Scanner(System.in);
String input = sc.next();
return input;
}
}
测试类
Test.java
import com.bank.service.BankService;
import com.bank.service.impl.BankServiceImpl;
public class Test {
public static void main(String[] args) {
BankService bank = new BankServiceImpl();
bank.userChoose(null);
}
}
java 创建账户类，定义存钱取钱，查询余额方法，并自定义两个异常
main方法不对啊
少了public
public static void main(String[] args) {}
这次是对的
怎么实现用java编写使用余额付款
abstract class BankCard {
protected String name;
protected String cardNo;
protected double money;
public BankCard(String name, String cardNo, double money) {
super();
this.name = name;
this.cardNo = cardNo;
this.money = money;
}
public String getName() {
return name;
}
public String getCardNo() {
return cardNo;
}
public double getMoney() {
return money;
}
public abstract void unputMoney(int someMoney);
public void putMoney(int someMoney) {
this.money += someMoney;
}
}
java 定义一个类实现银行账户 包括变量 "帐号""存款余额"，方法:"存款"，"取款"和"查询
private double money=0L ;
public void addMoney(double money){
this.money=this.money+ money;
System.out.println("余额"+this.money);
}
public void outMoney(double money){
if(moneythis.money){
System.out.println("余额不足！");
}else{
this.money=this.money- money;
System.out.println("取出"+money+"元，余额"+this.money);
}
}
public void getMoney(){
System.out.println("余额"+this.money);
}
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