중복 데이터 삭제(차집합)import java.util.ArrayList;import java.util.List;public class RemoveDuplicates { public static void main(String[] args) { List list1 = new ArrayList(List.of("apple", "banana", "orange", "grape")); List list2 = new ArrayList(List.of("banana", "kiwi", "grape", "melon")); // Remove duplicates from list1 that are in list2 list1.removeAll(list2); //..

public class FileUtils { public static List getFiles(String directory) { try(Stream filePaths = Files.walk(Paths.get(directory))) { return filePaths .filter(Files::isRegularFile) .collect(Collectors.toList()); } catch(IOException e) { e.printStackTrace(); return List.of(); } }}public class Main { public static void main(String[] args) { List files = FileUtils.getFiles(..

public class FileUtils { public static List getFiles(String directory) { try(Stream filePaths = Files.walk(Paths.get(directory))) { return filePaths .filter(Files::isRegularFile) .collect(Collectors.toList()); } catch(IOException e) { e.printStackTrace(); return List.of(); } }}

import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.TimeZone; public class DateExample {     public static void main(String[] args) {         String dateString = "2024-11-06 11:24:01 +0900";         SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");                  try {             Date date = formatter.parse(date..

Binary를 직접 가져오기pom.xml org.apache.httpcomponents.client5 httpclient5 5.1Spring Boot Codeimport org.springframework.core.io.InputStreamResource;import org.springframework.http.HttpHeaders;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestParam;impo..

pom.xml org.apache.httpcomponents.client5 httpclient5 5.1GET 방식import org.apache.hc.client5.http.classic.methods.HttpGet;import org.apache.hc.client5.http.classic.methods.CloseableHttpResponse;import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;import org.apache.hc.client5.http.impl.classic.HttpClients;import org.apache.hc.core5.http.io.entity.EntityUtils;public class HttpClientEx..