class Solution {
    public String[] solution(String[] todo_list, boolean[] finished) {
        String[] answer = {};
        return answer;
    }
}

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해결법

방법 1

import java.util.*;

class Solution {
    public List solution(String[] todo_list, boolean[] finished) {
    
        List<String> answer = new ArrayList<>();
        
        for (int i = 0; i < todo_list.length; i++) {
            if (finished[i] == false) {
                answer.add(todo_list[i]);
            }            
        }
        
        return answer;
    }
}

방법 2

import java.util.*;

class Solution {
    public String[] solution(String[] todo_list, boolean[] finished) {

        ArrayList <String> str = new ArrayList<>();
        
        for (int i = 0; i < finished.length; i ++) {
            if (!finished[i]) {
                str.add(todo_list[i]);
            }
        }

        String[] answer = new String[str.size()];
        
        for (int i = 0; i < str.size(); i ++) {
            answer[i] = str.get(i);
        }

        return answer;
    }
}

방법 3

class Solution {
    public String[] solution(String[] todo_list, boolean[] finished) {
        
        String[] temp = new String[todo_list.length];

        int count = 0;
        
        for (int i = 0; i < todo_list.length; i++) {
            if (!finished[i]) {
                temp[count++] = todo_list[i];
            }
        }

        String[] answer = new String[count];
        
        for (int i = 0; i < count; i++) {
            answer[i] = temp[i];
        }
        
        return answer;
    }
}

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할 일 목록 Lv. 0