money.java

使用它很方便

import java.util.Scanner;
import java.lang.NumberFormatException;
class Money {
	public static void main(String[] args){
		Money money=new Money();
		money.first(); 
		int a=0;
		int b=0;
			while(true){
				if(b==0){
					System.out.println("请输入你要计算的金额");
					}
				String earn=money.getMoney();
				try{
					a=Integer.parseInt(earn);
					}catch(NumberFormatException e){
						System.out.println("输入的格式错误请重新输入");
						b=1;
						continue;
						}
				
				if(a==0){
					System.exit(0);
					}else{
						System.out.println(money.getEarn(a));
						}
			
				}
		}
	public String getMoney(){
		Scanner sc=new Scanner(System.in);
		String test=sc.next();
		return test;
		}
	public float getEarn(int earn ){
		if(earn*0.01>50){
			return 50f;
			}else if(earn*0.01<2){
				return 2f;
			}else{
				return earn*0.01f;
							}
		}
	public void first(){
		System.out.println("你好");
		System.out.println("欢迎进入汇费计算系统");
		
		}	
}