JAVA程序设计(02.1)-----个税起征点计算

1.真见鬼  为啥第一次我这么输入的时候 不准我用else if 呢？？？？？

package com.lovo;

import java.util.Scanner;

public class Test05homework {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.print("请输入您的税前工资总额^_^：");
		double money = sc.nextDouble();
		System.out.print("请输入您坐在地的五险一金扣款额：");
		double five = sc.nextDouble();
		double end;
		int lev;
		double need = money - five - 3500;
		if (money > 0 && five > 0 && money - five > 0) {
			if (need <= 0) {
				end = 0;
				lev = 0;
			} 
			else if (need <= 1500) {
				end = need * 0.03 - 0;
				lev = 1;
			} 
			else if (need <= 4500) {
				end = need * 0.1 - 105;
				lev = 2;
			} 
			else if (need <= 9000) {
				end = need * 0.2 - 555;
				lev = 3;
			} 
			else if (need <= 35000) {
				end = need * 0.25 - 1005;
				lev = 4;
			} 
			else if (need <= 55000) {
				end = need * 0.3 - 2755;
				lev = 5;
			} 
			else if (need <= 80000) {
				end = need * 0.35 - 5505;
				lev = 6;
			} 
			else {
				end = need * 0.45 - 13505;
				lev = 7;
			}
			System.out.printf("您的应缴税工资等级为%d,您的应缴税工资额为%.2f元~", lev, end);
		} 
		else {
			System.out.println("您输入的金额不太对哦~ 亲~");
		}
		sc.close();
	}
}