banka.txt

JAVA ATA认证课本

import java.util.*;

class Card {
	public static int count = 0;

	public int KH = 0;

	public String ZH;

	public String MM;

	public String XM;

	private double JE;

	public Card() {
		count++;
		KH = count;
	}

	// 存款
	public double CunKuan(double money) {
		JE = JE + money;
		return JE;
	}

	// 取款
	public double QuKuan(double money) {
		if (money > JE) {
			System.out.println("\n 金额不足，取款失败！");
			System.out.println("   请重新操作！");
			return -1;
		} else {
			JE = JE - money;
			System.out.println("操作成功，账号余额:" + JE);
			return JE;
		}
	}

	// 查询
	public double getJE() {
		return JE;
	}

	// 转账
	public double ZhuanZhang(Card card, double money) {
		if (money > JE) {
			System.out.println("\n 金额不足，转账失败!");
			return -1;
		}
		JE = JE - money;
		System.out.println("\n 操作成功，账号余额:" + JE);
		card.CunKuan(money);
		System.out.println("收款人的账户余额为:" + card.getJE());
		return JE;
	}

	// 发卡
	public void setCard(String ZH, String MM, String XM) {
		this.ZH = ZH;
		this.MM = MM;
		this.XM = XM;
		this.JE = 0;
	}
}

// -----------------------------------------------------------------------------------------

public class Bank {
	Card[] card;

	public Bank() {
		card = new Card[1000];
		for (int i = 0; i < 1000; i++)
			card[i] = new Card();
		// 发卡
		card[0].setCard("42250001", "111111", "成龙");
		card[1].setCard("42250002", "222222", "李连杰");
		card[2].setCard("42250003", "333333", "李小龙");
		// 存款
		card[0].CunKuan(5000);
		card[1].CunKuan(6000);
		card[2].CunKuan(7000);

	}

	public Card getCard(String ZH) {
		for (int i = 0; i < 1000; i++) {
			if (ZH.equals(card[i].ZH) == true)
				return card[i];
		}

		return null;

	}

	public static void main(String[] args) {
		int which, end = 0;
		int ID = -1;
		int errornum = 0;
		Bank bank = new Bank();

		while (true) {
			System.out.print("\n 请输入账号:");
			Scanner sacnner = new Scanner(System.in);
			String ZH = sacnner.next();
			System.out.print(" 请输入密码:");
			String MM = sacnner.next();

			for (int n = 0; n < 3; n++) {
				if (ZH.equals(bank.card[n].ZH) == true&& MM.equals(bank.card[n].MM) == true) {
					ID = n;
					break;
				}
			}
			if (ID != -1) {
				System.out.println("\n\n ********* 登陆成功，欢迎使用！*********");
				break;
			} else
				errornum++;
			if (errornum <= 2) {
				System.out.println("\n 账号或密码错误，请重新操作！");
			}
			if (errornum >= 3) {
				System.out.println("输入错误次数超过三次，请退出！");
				end = 1;
				break;
			}
		}
		System.out.println("您当前使用的账号名:" + bank.card[ID].XM);
		if (end == 1)
			return;

		flag:
			while (true) {
			System.out.println("\n 1--查询，2--取款，3--存款，4--转账，5--退出");
			System.out.print("请选择您的操作：");
			Scanner sacnner = new Scanner(System.in);
			which = sacnner.nextInt();
			switch (which) {
			case 1:
				System.out.println("\n 您的账号余额为:" + bank.card[ID].getJE());
				break;

			case 2:
				System.out.print("\n 请输入取款金额：");
				double money = sacnner.nextInt();
				bank.card[ID].QuKuan(money);
				break;

			case 3:
				System.out.print("\n 请将存款金额放入验钞槽并输入存款金额:");
				money = sacnner.nextInt();
				bank.card[ID].CunKuan(money);
				System.out.println("\n 存款成功，当前账号余额：" + bank.card[ID].getJE());
				break;

			case 4:
				System.out.print("\n 请输入收款人的账号：");
				String ZH = sacnner.next();
				Card aa = bank.getCard(ZH);
				if (aa == null) {
					System.out.println("\n 您输入的收款人的账号不存在，请重新操作！");
					break;
				} else {
					System.out.print("\n 请输入转账金额：");
					money = sacnner.nextInt();
					bank.card[ID].ZhuanZhang(aa, money);
					break;
				}

			case 5:
				System.out.println("\n *** 谢谢使用！***");
				break flag;
			}
		}
	}
}