Question

Write a java program to enter a string in mixed case. Arrange all the letters of the string such that all the lower case character s followed by the upper case characters.

Answer 1

Answer:

import java.util.*;

public class Main

{

public static void main(String[] args) {

 Scanner sc = new Scanner(System.in);

 System.out.print("Enter a string:");

 String x = sc.next();

 ArrayList<Character> lowerCase = new ArrayList<>();

 ArrayList<Character> upperCase = new ArrayList<>();

 int n = x.length();

     for(int i = 0; i < n-1; i++){

         if(Character.isLowerCase(x.charAt(i))){

                 lowerCase.add(x.charAt(i));

             }

             else{

                 upperCase.add(x.charAt(i));

             }

     }

 String j = "" , y = "";

     for (char c : lowerCase){

         j += c;

     }

     for (char c : upperCase){

         y += c;

     }

     System.out.println("Original string:" + x);

     System.out.println("String after putting lower case Characters in the first and upper case Characters in the end:" + (j+y));

}

}

Explanation: