[Leetcode] - Maximum Odd Binary Number

문제링크: https://leetcode.com/problems/maximum-odd-binary-number/description/?envType=daily-question&envId=2024-03-01

Maximum Odd Binary Number - LeetCode

 

풀이

class Solution {

    public String filterBySubString(String originString, String subString) {
        BinaryOperator<String> concatOperator = (partialString, element) -> partialString + element;

        return originString.chars()
                            .mapToObj(c -> String.valueOf((char) c))
                            .filter(c -> c.contains(subString))
                            .reduce("", concatOperator);
    }
    public String maximumOddBinaryNumber(String s) {
        String oneString = filterBySubString(s, "1");
        String zeroString = filterBySubString(s, "0");

        String ans = oneString + zeroString;
        return ans.substring(1) + "1";
    }
}