关于java:训练营-计算器

package com.tedu;import java.util.Scanner;//接管用户输出的两个int类型数值//依照用户输出1,2,3,4，别离执行相应的+-*/办法 将最初的后果输入至控制台。public class Test08 {    public static void main(String[] args) {        System.out.println("请输出第一个数字");        int a = new Scanner(System.in).nextInt();        System.out.println("请输出第二个数字");        int b = new Scanner(System.in).nextInt();        System.out.println("请输出要执行的运算");        int c = new Scanner(System.in).nextInt();        if (c==1){            add(a,b);        }else if (c==2){            substruction(a,b);        }else if(c==3){            multiplication(a,b);        }else if(c==4){            division(a,b);        }    }    private static void division(int a, int b) {        int sum=a/b;        System.out.println("sum = " + sum);    }    private static void multiplication(int a, int b) {        int sum=a*b;        System.out.println("sum = " + sum);    }    private static void substruction(int a, int b) {        int sum = a-b;        System.out.println("sum = " + sum);    }    private static void add(int a, int b) {        int sum=a+b;        System.out.println("sum = " + sum);    }}