Reorder Data in Log Files - Company-specific OAs / Amazon OA

Problems
1

https://algo.monster/problems/reorder_data_in_log_files

2

Simple Java Solution:

class Solution {
    public String[] reorderLogFiles(String[] logs) {
        String[] answer = new String[logs.length];
        List<String> digits = new ArrayList<>();
        
        
        Queue<LetterLog> pq = new PriorityQueue<>((a, b) -> {
            if (!a.content.equals(b.content)) {
                return a.content.compareTo(b.content);
            }
            return a.identifier.compareTo(b.identifier);
        });
        
        for (int i = 0; i < logs.length; i++) {
            String log = logs[i];
            
            String[] logArray = log.split(" ");
            
            if(logArray[1].charAt(0) < 'a') {
                digits.add(log);
            } else {
                pq.add(new LetterLog(log));
            }
        }
        
        int counter = 0;
        while (!pq.isEmpty()) {
            LetterLog letterLog = pq.poll();
            answer[counter] = letterLog.full;
            counter++;
        }
        
        for (String digitLog : digits) {
            answer[counter] = digitLog;
            counter++;
        }
        
        return answer;
    }
}

class LetterLog {
    public String identifier;
    public String content;
    public String full;
    
    public LetterLog(String input) {
        full = input;
        identifier = input.substring(0, input.indexOf(" "));
        content = input.substring(input.indexOf(" ") + 1);
    }
}