银行管理

[java]代码库

import java.util.*;
public class UserInterface
{
	public static void main(String args[]){
		Cards card0 = new Cards();
		Cards card1 =new SavingsCard();
		Cards card2 =new CreditCard();
		int k=-1;
		Scanner scan = new Scanner(System.in);
		Scanner scan0 = new Scanner(System.in);
		Scanner scan1 = new Scanner(System.in);
		Scanner scan2 = new Scanner(System.in);
		do{
			System.out.println("银行卡管理系统");
			System.out.println("1.开卡");
			System.out.println("2.存款");
			System.out.println("3.取款");
			System.out.println("4.查询余额");
			System.out.println("0.退出系统");
			System.out.println("请输入:");
			k = scan.nextInt();
			switch(k){
				case(1):{
					System.out.println("请输入开卡类型:\n1.储蓄卡\n2.信用卡");
					int j;
					j = scan0.nextInt();
					switch(j){
						case(1):{
							card0 = card1;
							System.out.println("您已开通储蓄卡！");
							break;
						}
						case(2):{
							card0 = card2;
							System.out.println("您已开通信用卡！");
							break;
						}
						default:{
							System.out.println("非法输入。");
							break;
						}
					}
					break;
				}
				case(2):{
					System.out.println("请输入存款金额:");
					card0.saveMoney(scan1.nextDouble());
					break;
				}
				case(3):{
					System.out.println("请输入取款金额:");
					card0.takeMoney(scan2.nextDouble());
					break;
				}
				case(4):{
					System.out.println("账户余额为:"+card0.getBalance());
					break;
				}
				case(0):{
					break;
				}
				default:{
					System.out.println("非法输入。");
				}
			}
		}while(k!=0);
		scan.close();
		scan0.close();
		scan1.close();
		scan2.close();
	}
}

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