java之 ------ 類的封裝、繼承和多態（二）

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問題：聲明銀行賬戶類，成員變數包括帳號、儲戶姓名、開啟時間、社會安全號碼碼、存款餘額等賬戶資訊，成員方法包括開戶、存款、取款、查詢（餘額、明細）、銷戶等操作。

主要成員描述如下

public class Account {                        //賬戶類    private String name;                   //儲戶姓名    private double balance;                  //賬戶餘額    public Account(String name)             //構造方法，參數指定儲戶姓名    public String getName()                //返回賬戶名    public double balance()                 //查看賬戶餘額    public boolean put(double value)         //存款操作，參數為存入金額    public double get(double value)           //取款操作，參數為取款金額，返回實際取到金額}

import java.util.Scanner;import java.math.*;class Account{String name;static int count=0;static String[] opea=new String[10000];static double[] val=new double[1000];double balance;static  String accountID="6215000000000000000";String id;public Account(String name,double balance,String id){this.set(name,balance,id);}public void set(String name,double balance,String id){this.name=name;this.balance=balance;if(id.length()>18||id.length()<1){System.out.println("Input ID Error !");return ;}this.id=id;accountID=add(accountID);}public void inquire(){System.out.println("-------balance and trad information -------");System.out.println("balance : "+this.balance);for(int i=0;i<count;i++){System.out.println(opea[i]+" "+val[i]);}}public String getName(){return "AccoutName : "+this.name+"\nAccountID "+this.accountID+"\nID: "+id.substring(0,6)+"********"+id.substring(14,id.length());}public double balance(){return this.balance;}public boolean put(double value){this.balance+=value;if(value==0){return false;}opea[count]="put";val[count++]=value;return true;}public double get(double value){if(value>this.balance){System.out.println("lack of balance !!!");return 0;}opea[count]="get";val[count++]=value;this.balance-=value;return value;}public boolean exit(){return true;}public static String add(String str){char[] c=new char[19];int leng=19;int sign=0,i;for(i=0;i<19;i++){leng=leng-1;int sum=0;sum+=str.charAt(leng)-'0';if(i==0){sum+=1;}sum+=sign;c[leng]=(char)(sum+48);if(sum>=10){sign=1;c[leng]=(char)(sum%10+48);}else{sign=0;}}return String.valueOf(c);}}class Main{public static void main(String[] args){Account p=new Account("Tom",1000,"340822123409231190");System.out.println("-------Accoutn information-------");System.out.printf(p.getName());System.out.println();System.out.println("balance : "+p.balance());p.put(123213);p.inquire();System.out.println();Account p2=new Account("Sex",100000,"340822123434533454");System.out.println("-------Accoutn information-------");System.out.printf(p2.getName());System.out.println();System.out.println("balance : "+p2.balance());p2.get(12);System.out.println("balance : "+p2.balance());p2.get(12000000);System.out.println("balance : "+p2.balance());p2.inquire();System.out.println();}}

java之 ------ 類的封裝、繼承和多態（二）