[Programmers][Java] Lv2 42746 가장 큰 수

1) 문제

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https://school.programmers.co.kr/learn/courses/30/lessons/42746

 

2) 코드

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import java.util.*;
import java.io.*;

class Solution {
    public String solution(int[] numbers) {
        StringBuilder answer = new StringBuilder();


        String[] arr = new String[numbers.length];
        for(int i=0;i<numbers.length;i++) {
            arr[i] = String.valueOf(numbers[i]);
        }
        Arrays.sort(arr, (a, b) -> (b+a).compareTo(a+b));
        
        
        if(arr[0].equals("0")) return "0";
        
        for (int i = 0; i < arr.length; i++) {
            answer.append(arr[i]);
        }
        
        return answer.toString();
    }
}

 

3) 피드백

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람다식 코테에서 처음 써봤다! 알아두자!