day10.15

package day1015;

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double sum = 0, jiju = 0;
        System.out.print("请输入收入：");      　double falary = sc.nextDouble();
        System.out.print("请输入五险一金费用：");
        double wuxian = sc.nextDouble();
        jiju = falary - wuxian -3500;
        if (falary - wuxian <= 0){
            System.out.printf("个人所得税为:0元");
        }
        else if (jiju > 0 &&  jiju <= 1500){
            sum = jiju * 0.03;
        }
        else if(jiju > 1500 && jiju <= 4500){
            sum = jiju* 0.1 - 105;
        }
        else if (jiju > 4500 && jiju <= 9000){
            sum = jiju * 0.2 - 555;
        }
        else if (jiju > 9000 && jiju <= 35000){
            sum = jiju * 0.25 - 1005;
        }
        else if (jiju > 35000 && jiju <= 55000){
            sum = jiju * 0.3 - 2755;
        }
        else if (jiju > 55000 && jiju <= 80000){
            sum = jiju* 0.35 - 5505;
        }
        else if (jiju > 80000 ){
            sum = jiju * 0.4 - 13505;
        }
        else{
            System.out.printf("输入有误");
        }
        System.out.printf("个人所得税为:%.2f元",sum);
    }

}

总结：

在指令框显示：你好**！

package com.lovo;

import javax.swing.JOptionPane;

public class Hello {
    public static void main(String[] args) {　　　　　//在指令框输入名字
        String name = JOptionPane.showInputDialog("请输入你的名字");　　　　　//在指令框显示：你好name（输入的名字）!
        JOptionPane.showMessageDialog(null,"你好"+name+"!");
    }

}