Question

I need some help on Java. I'm stuck on trying to generate a new string by concatenating the reversed substrings of even indexes and odd indexes separately from a given string. I'm not sure how to figure this out. See example.

Example:

Input: abscacd

Output: dasaccb

Substrings: asad, bcc

Reversed substrings: dasa, ccb.

Answer 1

import java.util.Scanner;

public class ReverseSubStrings {
public static void main(String[] args) {
  
   // reading string from user
   Scanner sc = new Scanner(System.in);
   System.out.println("Enter String");
   String str=sc.nextLine();
  
   String even="";
   String odd="";
// looping to get even and odd substrings
   for(int i=0;i<str.length();i++){
       if(i%2==0)
           even=even+str.charAt(i)+"";
       else
           odd=odd+str.charAt(i)+"";
   }
   // reversing the sub strings
   String rev1=new StringBuffer(even).reverse().toString();
   String rev2=new StringBuffer(odd).reverse().toString();
   System.out.println("Reversed substrings : "+rev1+","+rev2);
   System.out.println("Output : "+rev1+rev2);
}
}