[프로그래머스] 문자열을 정수로 바꾸기 --java

https://school.programmers.co.kr/learn/courses/30/lessons/12925

프로그래머스

문제)문자열 s를 숫자로 변환한 결과를 반환하는 함수, solution을 완성하세요.

 

 

 

 

 

 

풀이)

import java.util.Scanner;

class Solution {
    public int solution(String s) {
        int answer = 0;

        for(int i=0; i<s.length(); i++){
            if(s.charAt(0)=='-'){
                String str = s.substring(1,s.length());
                answer = -1*Integer.parseInt(str);
            }else{
                answer = Integer.parseInt(s);
            }
        }
        return answer;
    }

    public static void main(String[] args){
        Solution T = new Solution();
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        System.out.println(T.solution(s));
    }
}