wallet.java

用Java编写的自动储钱程序,模拟ATM

import java.io.*;

public class Wallet {
	private int money;

	public void Wallet() {
		money = 0;
	}

	public void savemoney(int inputmoney) {
		money = money + inputmoney;
	}

	public void loadmoney(int inputmoney) {
		money = money - inputmoney;
	}

	public void checkmoney() {
		System.out.println("余额为：" + money);
	}

	public static void main(String[] agrs) throws IOException {
		Wallet wt = new Wallet();
		Boolean b;
		do {
			System.out.println("存钱按1，取钱按2，查询余额请按3");
			BufferedReader reader1 = new BufferedReader(new InputStreamReader(
					System.in));
			String s = reader1.readLine();
			Integer in = new Integer(s);
			switch (in) {
			case 1: {
				System.out.println("你要存多少钱？");
				BufferedReader reader2 = new BufferedReader(
						new InputStreamReader(System.in));
				String s1 = reader2.readLine();
				Integer in1 = new Integer(s1);
				wt.savemoney(in1);
			}
				break;
			case 2: {
				System.out.println("你要取多少钱？");
				BufferedReader reader3 = new BufferedReader(
						new InputStreamReader(System.in));
				String s2 = reader3.readLine();
				Integer in2 = new Integer(s2);
				wt.loadmoney(in2);
			}
				break;
			case 3:
				wt.checkmoney();
			}
			System.out.println("继续请按E键，退出请按回车键");
			BufferedReader reader4 = new BufferedReader(new InputStreamReader(
					System.in));
			String s3 = reader4.readLine();

			b = (s3.equals("e"));
		} while (b);
	}
}