프로그래머스 : 문자열 계산하기

package practice;


class Solution {
    public int solution(String my_string) {
        String[] arr = my_string.split(" ");

        int answer = Integer.parseInt(arr[0]);

        for (int i = 1; i < arr.length; i=i+2) {
            if(arr[i].equals("+")) {
                answer += Integer.parseInt(arr[i+1]);
            }else{
                answer -= Integer.parseInt(arr[i+1]);
            }
        }
        return answer;
    }
}



public class Programmers {

    public static void main(String[] args) {

        String my_string = "3 + 4";

        System.out.println(new Solution().solution(my_string));

    }

}