뎁엠마

TreeMap이랑 Stream은 어떨 때 쓰면 좋을까비슷한 상황에서 각각 예시를 보자 TreeMap sortedMap = new TreeMap(totalMap);int[] result = new int[sortedMap.size()];int idx = 0;for (String car : sortedMap.keySet()) { int totalTime = sortedMap.get(car); int baseTime = fees[0], baseFee = fees[1], unitTime = fees[2], unitFee = fees[3]; if (totalTime return totalMap.entrySet().stream() .sorted(Map.Entry.comparin..

filter() "조건에 맞는 요소 필터링"  짝수만 남기기 List numbers = Arrays.asList(1, 2, 3, 4, 5, 6);List evenNumbers = numbers.stream() .filter( n -> n % 2 == 0) .collect(Collectors.toList());map() "각 요소 변환"각 단어를 대문자로 변환List words = Arrays.asList("java", "stream", "example");List upperCaseWords = words.stream() ..