上一篇（https://blog.csdn.net/yql_617540298/article/details/106477419）分享了Java实现模拟银行系统的主要代码，因为简单实现，没有连接数据库，所以把Card类源码贴上。 

package bean;

public class Card {
	private String num;
	private String pwd;
	private float money;
	private String name;
	public Card(String num,String pwd,float money,String name){
		this.num=num;
		this.pwd=pwd;
		this.money=money;
		this.name=name;
	}
	public String getNum() {
		return num;
	}
	public void setNum(String num) {
		this.num = num;
	}
	public String getPwd() {
		return pwd;
	}
	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
	public float getMoney() {
		return money;
	}
	public void setMoney(float money) {
		this.money = money;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}

package income;

import java.util.ArrayList;

import bean.Card;

public class CardArray {
		public static ArrayList<Card> al;
		public static boolean count;
		public static void init(){
			if(count==false){
			al=new ArrayList<Card>();
			Card card[]=new Card[4];
			card[0]=new Card("111111","111111",10000,"xyq");
			card[1]=new Card("222222","222222",20000,"syw");
			card[2]=new Card("333333","333333",300000,"yql");
			card[3]=new Card("admin","admin",0,"管理员");
			for(int i=0;i<card.length;i++)
				al.add(card[i]);
			}
		}	
}