java编程简易计算器

package Calculator;import java.util.Scanner;//java编程简易计算器public class Calculator {    public static void main(String[] args){        int a = 10;        while(a > 0){ //死循环            System.out.println("简易计算器 : \n整数输入: op1  op  op2\n,op只能是+,-,*,/\n请输入:");            Scanner sr = new Scanner(System.in);            JiSuan j = new JiSuan(sr.nextInt(),sr.next(),sr.nextInt());        }       }}class JiSuan{    JiSuan(int op1,String op,int op2){        if(op.equals("+")){            System.out.println(op1+op2);        }else if(op.equals("-")){            System.out.println(op1-op2);        }else if(op.equals("*")){            System.out.println(op1*op2);        }else if(op.equals("/")){            System.out.println(op1/op2);        }else{            System.out.println("输入有误");        }    }}