类的封装

package 实验包;

import java.text.SimpleDateFormat;
import java.util.*;

public class Account {
 String name,shengfenzheng_number;
 double cunkuan_yue;
 Date kaihu_time;
 int zhanghao[]=new int[11];
 public Account kaihu(Account person){
  kaihu_time=new Date();
  SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");
  System.out.println("您开户的时间是:"+format.format(kaihu_time));
  for(int i=0;i<11;i++){
   person.zhanghao[i]=(int)(Math.random()*10);
  }
  person.cunkuan_yue=0.0;
  System.out.print("您的银行账户号码是:");
  for(int i=0;i<11;i++){
   System.out.print(person.zhanghao[i]);
  }
  System.out.println();
  System.out.println("您的存款余额为:"+person.cunkuan_yue);
  return person;
 }
 public Account cunkuan(double money){
  Account person=new Account();
  person.cunkuan_yue=money;
  return person;
 }
 public Account qukuan(Account person,double money){
  if(person.cunkuan_yue<money){
   System.out.println("您的存款余额为:"+person.cunkuan_yue);
  }
  person.cunkuan_yue=person.cunkuan_yue-money;
  return person;
 }
 public void chakan(Account person){
  System.out.println("您当前的余额为:"+person.cunkuan_yue);
 }
 public static void main(String[] args) {
  Account person=new Account();
  Scanner in=new Scanner(System.in);
  System.out.print("请输入您的姓名:");
  person.name=in.nextLine();
  System.out.print("请输入您的身份证号码:");
  person.shengfenzheng_number=in.nextLine();
  person=person.kaihu(person);
  System.out.print("请输入您想存款的数额:");
  double qian=in.nextDouble();
  person=person.cunkuan(qian);
  System.out.println("您现在的存款余额为:"+person.cunkuan_yue);
  System.out.print("请输入您想取款的数额:");
  qian=in.nextDouble();
  person=person.qukuan(person,qian);
  System.out.println("您现在的存款余额为:"+person.cunkuan_yue);
  person.chakan(person);
 }
}