Java实现加减乘除，并能循环接收新数据 scanner 方法 +-*/

实现加减乘除，并能循环接收新数据，产生交互

package method;

import java.util.Scanner;

public class Demo08 {
    public static void main(String[] args) {
        Demo08 test =new Demo08();
        test.result();
    }
    public static void result( ) {
        ;

        Scanner scanner1 = new Scanner(System.in);
        Scanner scanner2 = new Scanner(System.in);
        Scanner scanner3 = new Scanner(System.in);
        System.out.println("请输入第一个数字");
        int x = scanner1.nextInt();

        System.out.println("请输入第二个数字");
        int y = scanner2.nextInt();

        System.out.println("请选择+、-、*、/");

            String $ = scanner3.nextLine();
switch ($){
    case"+":
        System.out.println("结果为："+ plus(x,y));
        break;
    case"-":
        System.out.println( "结果为："+minus(x,y));
        break;
    case "*":
        System.out.println( "结果为："+time(x,y));
        break;
    case"/":
        System.out.println("结果为："+ divide(x,y));
        break;
    default:
        System.out.println("输入的符号不对");

}
        result();
}





    public static int plus(int a , int b){
        return a+b;
    }

    public static int minus(int a, int b ){
        return a-b;
    }
    public static int time(int a, int b ){
        return a*b;
    }
    public static int divide(int a, int b ){
        return a/b;
    }
}

当运算符输入不对时，会重新开始，但是数字不对时，会报错，这个还没解决，如果你解决了请告诉我