youngjinmo

public class orderByAsciiReverse {
  public static String orderByinReverse(String str){
    String[] temp = str.split("");
    Arrays.sort(temp, Collections.reverseOrder());
    
    String changed = "";
    for (int i = 0; i < temp.length; i++) {
        changed += temp[i];
    }
    

youngjinmo

import java.util.Arrays;

public class quizTest_03 {
   public static String orderByAscii(String str){
    String[] temp = str.split("");
    Arrays.sort(temp);
    
    String change = "";
    for (int i = 0; i < temp.length; i++) {
        change += temp[i];

youngjinmo

import java.util.Arrays;

public class exampleCodes {
  public static void main(String[] args){
    String data = "Hello world";
    String[] strArray_01 = data.split("");
    String[][] strArray_02 = {strArray_01, strArray_01};
    
    System.out.println(Arrays.toString(strArray_01));
    // [H, e, l, l, o, , w, o, r, l, d]

youngjinmo

import java.util.Arrays;

public class str2strArray{
  public static void main(String[] args){
    String data = "Hello world";
    String[] strArray = data.split("");
    
    System.out.println(Arrays.toString(strArray));
    // [H, e, l, l, o, w, o, r, l, d]
    

youngjinmo

public class castingToInteger {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Double to Integer : " + (int)b);
    // Double to Integer : 3
    

youngjinmo

public class castingToString {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Integer to String : " + String.valueOf(a));
    System.out.println("Integer to String : " + Integer.toString(a));
    // Integer to String : 66

youngjinmo

public class toChar {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Integer to char : " + (char)a);
    // Integer to char : B
    

youngjinmo

public class toDouble {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Integer to double : " + (double)a);
    // Integer to double : 66.0
   

youngjinmo

import java.util.Arrays;

public class quizTest_02 {
    public static String changeByLetters(String str) {
        String[] arr = str.split("");
      
        for (int i = 0; i <arr.length; i++) {
            if(arr[i]==arr[i].toLowerCase()){
              // 문자가 소문자일 경우, 대문자로 변환 
                arr[i] = arr[i].toUpperCase();

youngjinmo

public class quizTest_01 {
  public static String changeByIndex(String str){
    String[] strArray = str.split("");
    
    for(int i=0; i<strArray.length; i++){
      // 인덱스가 0 또는 짝수인 문자를 대문자화
      if(i==0 || i%2==0){
       strArray[i] = strArray[i].toUpperCase();
      } else {
        // 인덱스가 홀수인 문자를 소문자화