java实现ATM机功能

package com.ATM; public class panduan { int AccountID ; Account account = new Account(); CardAccount ca1 = new PostalsavingsBank(); CardAccount ca2 = new MerchantsBank(); CardAccount ca3 = new ChinaBank(); UserAccount U = new UserAccount(); public void panduan1(){ System.out.println("******************"); System.out.println("请选择项目服务序号"); System.out.println("1.查询余额"); System.out.println("2.取款服务"); System.out.println("3.存款服务"); System.out.println("4.退出服务"); System.out.println("******************"); } public void CardNamepanduan(int AccountID){ this.AccountID = AccountID; Integer in = new Integer(AccountID); String str = in.toString(); char[] a= new char[4]; a[0]=str.charAt(0); System.out.println("888888"); if(a[0]=='1'){ ca1.getCardName(); }else{ if(a[0]=='2'){ ca2.getCardName(); }else{ if(a[0]=='3'){ ca3.getCardName(); } } } } public void getMoneypanduan(int a){ if(a<=0){ try{ throw new Exception("请输入正确的钱数"); }catch(Exception e ){ System.out.println(e.getMessage()); } }else{ if(account.searchMoney1()>2000){ if(a>2000&&a<account.searchMoney1()){ try{ throw new Exception("您输入的金额超出了一次取款最大金额，请重新输入"); }catch(Exception e){ System.out.println(e.getMessage()); } }else{ if(a>account.searchMoney1()){ try{ throw new Exception("超出了您的存款余额，请重新输入"); }catch(Exception e){ System.out.println(e.getMessage()); } }else{ if(a%100!=0){ try{ throw new Exception("本机只提供100元纸钞，请重新输入合适的钱数"); }catch(Exception e){ System.out.println(e.getMessage()); } }else{ account.getMoney(a); } } } }else{ if(a>account.searchMoney1()&&a<2000){ try{ throw new Exception("超出了您的存款余额，请重新输入"); }catch(Exception e){ } }else{ if(a>2000){ try{ throw new Exception("您输入的金额超出了一次取款最大金额，请重新输入"); }catch(Exception e){ System.out.println(e.getMessage()); } }else{ if(a%100!=0){ try{ throw new Exception("本机只提供100元纸钞，请重新输入合适的钱数"); }catch(Exception e){ System.out.println(e.getMessage()); } }else{ account.getMoney(a); } } } } } } public void putMoneypanduan(int a){ if(a<=0){ try{ throw new Exception("请输入正确的钱数"); }catch(Exception e ){ System.out.println(e.getMessage()); } }else{ account.putMoney(a); } } }