youngjinmo

public class Solution {
  public ListNode reverseList(ListNode head) {
    ListNode prev = null;
    ListNode current = head;

    while (current != null) {
      ListNode next = current.next;
      current.next = prev;
      prev = current;
      current = next;

youngjinmo

public class Example01{
    Integer num = 20;
}

youngjinmo

public class StudyHaleEx01 {
    public static void main(String[] args) {
        StudyHale02 study = new StudyHale02();
        int[] arr = new int[10];

        // 타입 추론
        var typeInference01 = "greeting";
        var typeInference02 = arr;
        var typeInference03 = study;
        var typeInference04 = study.greeting;

youngjinmo

import java.io.*;

public class FileClone {
    public static void main(String[] args) throws IOException {

        String target = "korean.txt";
        String cloneFile = "clone.txt";

        // 타겟 대상 파일 읽어들여서 콘솔에 출력하기
        String fileread = inputWord(target, 1000);

youngjinmo

package parseJsoup;

import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

youngjinmo

package jsoupsample;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Timer;
import java.util.TimerTask;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

youngjinmo

create table dept(  
  deptno     number(2,0),  
  dname      varchar2(14),  
  loc        varchar2(13),  
  constraint pk_dept primary key (deptno)  
);

create table emp(  
  empno    number(4,0),  
  ename    varchar2(10),  

youngjinmo

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**

youngjinmo

import java.util.Arrays;

public class strArr2String {
   public static void main(String[] args) {
    String data = "Hello World";
    String[] temp = data.split("");
    
    String changed = "";
    for (int i = 0; i < temp.length; i++) {
        changed += temp[i];

youngjinmo

import java.util.Arrays;

public class string2charArr {
   public static void main(String[] args) {
      String data = "Hello World";
     
      String[] strArr = data.split("");
      char[] charArr = data.toCharArray();
     
      System.out.println(Arrays.toString(strArr));