用java模仿ATM（记录的功能似乎有点问题，哪位老大帮我看看）

最近在用java学习OOP，写了一个模仿ATM的程序。

package atm;import java.io.*;/** * 记录类：记录用户操作，包含存款，取款，转账的相关信息*/class Record{private String cardNum;private String operType;private int opAmount;/*构造方法*/Record(){this.cardNum = null;this.operType = null;this.opAmount = 0;}void set_cardNum(String carNum){this.cardNum = carNum;}void set_opType(String type){this.operType = type;}void set_opAmount(int amount){this.opAmount = amount;}String get_cardNum(){return cardNum;}String get_opType(){return operType;}int get_opAmount(){return opAmount;}void record_all(String num, String ty, int amo){set_cardNum(num);set_opType(ty);set_opAmount(amo);}}class Account{private String name;private String Number;private String Password; private double Remain;Record[] record = new Record[10];/*每个账户拥有10个记录单元*/public Account(){for(int i=0;i<record.length;i++){record[i] = new Record();record[i].set_cardNum("empty");record[i].set_opAmount(0);record[i].set_opType("empty");}}String returnName(){return name;}String returnNum(){return Number;}String returnPsw(){return Password;}double returnRemain(){return Remain;}void setNum(String num){this.Number = num;}void setPsw(String new_psw){this.Password = new_psw;}/* 对账户余额的操作。 * 参数为操作金额和操作类型。 * 取款操作时，先比较取出金额和账户剩余金额， * 操作类型为1：存款，2：取款。 * 在这里，ATM类中的存/取款方法均调用setRemain方法。*/void setRemain(double amount,int type){/*对输入的数量进行检查*/if((amount > 9999)||(amount < 0)){System.out.println("输入不合法，请重新输入：");return;}/*存款操作*/if(type == 1){Remain+=amount;/*操作记录 *记录操作账号，金额，类型*/record[UserHelper.presentRecord].set_cardNum(UserHelper.get_num());record[UserHelper.presentRecord].set_opAmount((int)amount);record[UserHelper.presentRecord].set_opType("存款");UserHelper.presentRecord++;}/*取款操作*/else if(type == 2){if(Remain < amount)/*检查余额是否充足*/{System.out.println("余额不足");return;}else {Remain-=amount;record[UserHelper.presentRecord].set_cardNum(UserHelper.get_num());record[UserHelper.presentRecord].set_opAmount((int)amount);record[UserHelper.presentRecord].set_opType("取款");UserHelper.presentRecord++;}}}}/*保持当前登录的用户的信息*/ class UserHelper{/*当前登录账户的卡号和密码*/ private static String Tem_num;private static String Temp_psw;/*当前账户在账户数组的下标*/private static int the;/*当前记录单元的下标*/public static int presentRecord = 0; static void set_num(String num){Tem_num = num;}static void set_psw(String psw){Temp_psw = psw;}static void set_the(int th){the = th;}static String get_num(){return Tem_num;}static String get_psw(){return Temp_psw;}static int get_the(){return the;}} class ATM{ Account ac[] = new Account[5]; /*构造方法*/ public ATM() { for(int i=0;i<ac.length;i++) { ac[i] = new Account(); ac[i].setNum("8888"+i); ac[i].setPsw("0000"); ac[i].setRemain(1000, 1); }  }  BufferedReader reader=new BufferedReader(new InputStreamReader(System.in)); /*检查用户身份的合法性 * 要求登录用户输入卡号和密码进行验证 * 合法用户则返回true,并将当前登录用户的信息存入userHelper类中， * 非法用户返回false*/boolean check_user(Account ac[]){String tem_num = "null";String tem_psw = "null";    try     {     System.out.println("请输入您的卡号："); tem_num = reader.readLine(); System.out.println("请输入您的密码："); tem_psw = reader.readLine();}    catch (IOException e)    {// TODO Auto-generated catch blocke.printStackTrace();}        /*循环检查用户数组进行匹配*/    for(int i=0;i<ac.length;i++)    {    if((ac[i].returnNum().equals(tem_num)) && (ac[i].returnPsw().equals(tem_psw)))    {    /*保存合法用户的卡号和密码,位置至UserHelper*/    UserHelper.set_num(tem_num);    UserHelper.set_psw(tem_psw);    UserHelper.set_the(i);    return true;    }    continue;    }       return false;    }/*存款方法：接受用户输入的金额，按照输入金额的数量 * 在账户上增加相应的金额。 * 成功返回true，失败则返回false（未存入或者没有相应的账户）*/boolean Save_money() throws IOException{System.out.println("请输入您想存入金额的数量：（0~9999）");int save_amount = Integer.parseInt(reader.readLine());/*调用setRemain方法执行操作*/ac[UserHelper.get_the()].setRemain(save_amount, 1);return true;}/*取款方法*/boolean Drew_money() throws IOException{System.out.println("请输入您想取出金额的数量：（0~9999）");int drew_amount = Integer.parseInt(reader.readLine());/*调用setRemain方法执行操作*/ac[UserHelper.get_the()].setRemain(drew_amount,2);return true;}/*修改密码方法 *两次输入新密码确认*/boolean Change_psw() throws IOException{boolean ret = false; ;String psw_input1;String psw_input2;System.out.println("请输入新密码：");do{psw_input1 = reader.readLine();/*密码长度限制检查*/int length_lim = Integer.parseInt(psw_input1);if((length_lim > 999999)||(length_lim <100000)){System.out.println("密码长度为6位，请重新输入：");continue;}System.out.println("请再次输入新密码："); psw_input2 = reader.readLine();/*检查两次密码输入是否一致*/if(!(psw_input1.equals(psw_input2))){System.out.println("两次密码不一致！请重新输入：");continue;}ret = true;}while(!ret);/*设置新密码*/ac[UserHelper.get_the()].setPsw(psw_input1);return true;}/*转账方法：输入要转账的卡号和金额进行转账 *首先根据输入的目标卡号找到目标账户，然后从 *当前账户扣除要转账的金额*/boolean Transform_money() throws IOException {System.out.println("请输入您要转账的卡号");String dest_num = reader.readLine();System.out.println("请输入您要转账的金额：");int Transform_num = Integer.parseInt(reader.readLine());/*根据用户输入的卡号进行查找*/for(int j=0;j<ac.length;j++){if(ac[j].returnNum().equals(dest_num)){/*调用ac[i]的setRemain方法扣除当前账户余额*/ac[UserHelper.get_the()].setRemain(Transform_num, 2);/*调用ac[j]的setRemain方法*/ac[j].setRemain(Transform_num, 1);return true;}continue;}return false;}/*余额查询方法 **/void Remain_check(){System.out.println("您的账户余额为："+ac[UserHelper.get_the()].returnRemain());}boolean Continue() throws IOException{System.out.println("是否继续？（y/n）");String answer = reader.readLine();if(answer.equalsIgnoreCase("y")){return true;}return false;}/*打印明细方法*/void Print_detil(){System.out.println("当前账户的操作记录：");for(int k=0;k<ac[UserHelper.get_the()].record.length;k++){System.out.println("****************");System.out.println("卡号："+ac[UserHelper.get_the()].record[k].get_cardNum());System.out.println("操作类型："+ac[UserHelper.get_the()].record[k].get_opType());System.out.println("操作数量:"+ac[UserHelper.get_the()].record[k].get_opAmount());}}/*显示主界面*/void showMain() throws IOException{int choice = 0;boolean ret;System.out.println("**********************");System.out.println("欢迎使用ICBC自动柜员机");System.out.println("**********************");/*进行用户合法性验证*/if((!check_user(ac)))/*非法用户*/{System.out.println("非法身份！无法登陆");System.exit(0);}/*若是合法用户则继续*/do{System.out.println("请您选择服务种类:");System.out.println("1.存款                        2.取款");System.out.println("3.修改密码              4.转账");System.out.println("5.余额查询              6.退出");System.out.println("7.打印明细");try {choice = Integer.parseInt(reader.readLine());}catch (NumberFormatException e){// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}/*根据用户输入执行相应操作 **/switch(choice){case 1:Save_money();break;case 2:Drew_money();break;case 3:Change_psw();break;case 4:Transform_money();break;case 5:Remain_check();break;case 6:System.exit(0);break;case 7:Print_detil();break;}ret = Continue();}while(ret);}}  /*测试类*/public class Text {/** * @param args * @throws IOException  */public static void main(String[] args) throws IOException{ATM atm = new ATM();atm.showMain();}}