写了个代码请大家帮忙看看，指正一下（小白）
package practice;public class Four_Fortyfive_Array_User {
//数组空间
static Four_Fortyfive_Object_User[] Array=new Four_Fortyfive_Object_User[0];
//有效数据个数
static int num=0;
public Four_Fortyfive_Array_User(){
insert(new Four_Fortyfive_Object_User("张三","123456","17788888888"));
insert(new Four_Fortyfive_Object_User("李四","123456","17788888888"));
Array[1].saveManey(1000.0);
for(int i=0;i<num;i++){
Array[i].print();
}
}
//对数组加长5
static void expand(){
Array=java.util.Arrays.copyOf(Array,Array.length+5);
}
//移除指定位置的元素
public void remove(int postion){
if(postion>num-1||postion<0){
System.out.println("位置不合法不予执行。");
return;
}
for(int i=postion;i<num-1;i++){
Array[i]=Array[i+1];
}
num--;
}
//添加一个数在指定位置
static void insert(Four_Fortyfive_Object_User value){
if(Array.length==num){
expand();
}
Array[num]=value;
num++;
}
static void allPrint(){
for(int i=0;i<num;i++){
Array[i].print();
}
}
}
package practice;
import java.util.Scanner;
public class Four_Fortyfive_Object_Bank {
private Scanner Input=new Scanner(System.in);
private String Name;
private Four_Fortyfive_Array_User Depot=new Four_Fortyfive_Array_User() ;
//构造函数
public Four_Fortyfive_Object_Bank(){};
public Four_Fortyfive_Object_Bank(String Name){
this.Name=Name;
};
//调出主菜单
public void showMenu(){
do{
System.out.println("-----------------------------------"+Name+"欢迎您------------------------------------");
System.out.println("1、开户 2、存款 3、取款 4、转账 5、查询余额 6、修改密码 7、修改预留手机号码 8、注销账户 0、退出");
System.out.println("-----------------------------------------------------------------------------------");
System.out.print("请输入操作代码：");
int step=Input.nextInt();
switch(step){
case 1:setUser();break;
case 2:saveMoney();break;
case 3:getMoney();break;
case 4:transferMoney();break;
case 5:showSurplus();break;
case 6:changePassWord();break;
case 7:changePhoneNum();break;
case 8:logout();break;
case 0:System.out.println("谢谢您的使用，欢迎下次光临。");Depot.allPrint();return;
default:break;
}
}while(true);
}
//开户
public void setUser(){
String[] a=new String[4];
System.out.println("---开户程序---");
System.out.println("请输入您的姓名：");
a[0]=this.Input.next();
do{
System.out.println("请输入您的密码：");
a[1]=Input.next();
System.out.println("请再次输入以确认您的密码：");
a[2]=Input.next();
}while(!a[2].equals(a[1]));
System.out.println("请输入您的电话：");
a[3]=Input.next();
Four_Fortyfive_Object_User b=new Four_Fortyfive_Object_User(a[0],a[1],a[3]);
Depot.insert(b);
System.out.println("您的卡号是："+b.showCardId());
System.out.println("---开户完成---");
}
//存钱
public void saveMoney(){
boolean a;
String cardId;
double money;
Four_Fortyfive_Object_User to;
System.out.println("---存款程序---");
do{
do{
System.out.println("请输入您希望存款的卡号是：");
cardId=Input.next();
to=find(cardId);
}while(to==null);
do{
System.out.println("请输入您希望存款的金额是：");
money=Input.nextDouble();
}while(money<0.0);
System.out.println("您确定是向卡号为"+cardId+"的用户存上"+money+"元吗？（确认请输入true,重输请输入false）");
a=Input.nextBoolean();
}while(!a);
to.saveManey(money);
System.out.println("已经向卡号为"+cardId+"的用户存上"+money+"元");
System.out.println("---存款完成---");
}
//寻人
public Four_Fortyfive_Object_User find(String CardId){
for(int i=0;i<Depot.num;i++){
if(CardId.equals(Depot.Array[i].showCardId())){return Depot.Array[i];}
}
return null;
}
//登录
public Four_Fortyfive_Object_User signIn(){
int a=0;
do{
String CardId;
String PassWord;
Four_Fortyfive_Object_User User;
System.out.println("请输入您的卡号：");
CardId=Input.next();
User=find(CardId);
System.out.println("请输入您的密码：");
PassWord=Input.next();
if(PassWord.equals(User.showPassWord())){
return User;
}
a++;
}while(a<2);
System.out.println("*******吞卡*******");
System.exit(0);
return null;
}
//取款
public void getMoney(){
double money;
Four_Fortyfive_Object_User from;
System.out.println("---取款程序---");
from=signIn();
do{
System.out.println("您要取得金额为：");
money=Input.nextDouble();
}while(money>from.showSurplus()||money<0.0);
from.giveMoney(money);
System.out.println("---出款---");
System.out.println("---取款完成---");
}
//转账
public void transferMoney(){
double money;
Four_Fortyfive_Object_User from;
Four_Fortyfive_Object_User to;
System.out.println("---转账程序---");
from=signIn();
do{
System.out.println("您要转账的金额为：");
money=Input.nextDouble();
}while(money>from.showSurplus()||money<0.0);
do{
System.out.println("请输入您要转入的卡号是：");
to=find(Input.next());
}while(to==null);
from.giveMoney(money);
to.saveManey(money);
System.out.println("已经从卡"+from.showCardId()+"向卡"+to.showCardId()+"转入"+money+"元");
System.out.println("---转账结束---");
}
//查询余额
public void showSurplus(){
Four_Fortyfive_Object_User from;
System.out.println("---查询余额---");
from=signIn();
System.out.println("您的余额是："+from.showSurplus());
System.out.println("---查询结束---");
}
//改变密码
public void changePassWord(){
Four_Fortyfive_Object_User to;
String NewPassWord;
System.out.println("---修改密码---");
to=signIn();
do{
System.out.println("您的新密码是：");
NewPassWord=Input.next();
System.out.println("确认您的新密码是：");
}while(!NewPassWord.equals(Input.next()));
to.changePassWord(NewPassWord);
System.out.println("---修改成功---");
System.out.println("---修改结束---");
}
//改变手机号
public void changePhoneNum(){
Four_Fortyfive_Object_User to;
String NewPhoneNum;
System.out.println("---修改手机号---");
to=signIn();
System.out.println("您的新手机号是：");
NewPhoneNum=Input.next();
to.changePhoneNum(NewPhoneNum);
System.out.println("修改成功,您的新手机号是："+NewPhoneNum);
System.out.println("---修改结束---");
}
//注销
public void logout(){
Four_Fortyfive_Object_User to;
System.out.println("---注销程序---");
to=signIn();
int num=0;
if(to.showSurplus()!=0){
System.out.println("请取完所有余款。");
System.out.println("---注销失败---");
return;
}
for(int i=0;i<Depot.num;i++){
if(to.equals(Depot.Array[i])){
num=i;
}
}
Depot.remove(num);
System.out.println("---注销结束---");
}
}
package practice;
public class Four_Fortyfive_Object_User {
private String CardId;
private String Name;
private String PassWord;
private String PhoneNum;
private double Surplus=0.0;
//public Four_Fortyfive_Object_User(){};
public Four_Fortyfive_Object_User(String Name,String PassWord,String PhoneNum){
this.Name=Name;
this.PassWord=PassWord;
this.PhoneNum=PhoneNum;
int a=(int)(Math.random()*10000);
if(a<1000){
if(a<100){
if(a<10){
this.CardId="61000001000"+a;
}else{
this.CardId="6100000100"+a;
}
}else{
this.CardId="610000010"+a;
}
}else{
this.CardId="61000001"+a;
}
}
public void print(){
System.out.println("卡号："+this.CardId);
System.out.println("姓名："+this.Name);
System.out.println("密码："+this.PassWord);
System.out.println("手机："+this.PhoneNum);
System.out.println("余额："+this.Surplus);
}
public String showCardId(){
return this.CardId;
}
public void saveManey(double money){
this.Surplus+=money;
}
public String showPassWord(){
return this.PassWord;
}
public double showSurplus(){
return this.Surplus;
}
public void giveMoney(double money){
this.Surplus-=money;
}
public void changePassWord(String newpassword){
this.PassWord=newpassword;
}
public void changePhoneNum(String newPhoneNum){
this.PhoneNum=newPhoneNum;
}
}
package practice;
public class QF_Four_Section_Fortyfive {
public static void main(String[] arg){
Four_Fortyfive_Object_Bank zhong=new Four_Fortyfive_Object_Bank("中国银行");
zhong.showMenu();
}
}
