account.java

一个银行账户类

//实验2

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Account{
	private int leftmoney;	
	
	public static void main(String[] args){
	boolean goOn=true;	
	BufferedReader input;
	Account a=new Account();
	try{
		while(goOn){
			System.out.print("\n1.存款\n2.取款\n3.余额\n4.退出\n选择操作：");
			input=new BufferedReader(new InputStreamReader(System.in));
			String choice=input.readLine();
			if(choice.equals("1")) a.saveMoney();
			if(choice.equals("2")) a.getMoney();
			if(choice.equals("3")) a.getLeftMoney();
			if(choice.equals("4")) goOn=false;
		}
	}catch(Exception e){
		e.printStackTrace();
		}
	}	

	public void getLeftMoney(){
		System.out.println("余额为："+leftmoney);
	}
	
	public void saveMoney(){
		try{
			System.out.print("存入金额：");
			BufferedReader in=new BufferedReader(new InputStreamReader(System.in));	
			int moneyIn=Integer.parseInt(in.readLine());
			leftmoney+=moneyIn;
		}catch(Exception e){
			e.printStackTrace();
		}
	}

	public void getMoney(){
		try{
			System.out.print("取出金额：");
			BufferedReader out=new BufferedReader(new InputStreamReader(System.in));
			int moneyOut=Integer.parseInt(out.readLine());
			if(moneyOut<=leftmoney)
				leftmoney-=moneyOut;
			else
				System.out.println("最多取："+leftmoney);
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}