Program to reverse String without reversing special characters (Optimized Solution)

Program to reverse String without reversing special characters (Optimized Solution)

 

Code:

 

 

public class Practice3 {

 

      public static void main(String[] args) {

           

            String str = "ABC@DEF#GHI";

            int len = str.length();

            char[] arr = str.toCharArray();

           

            for(int i = 0, j = len-1; i<j;) {

                  if(!Character.isAlphabetic(arr[i]))

                        i++;

                  else if(!Character.isAlphabetic(arr[j]))

                        j--;

                  else {

                        //Swap

                        char temp = arr[i];

                        arr[i] = arr[j];

                        arr[j] = temp;

                        i++;

                        j--;

                  }

            }

            String reversed = new String(arr);

            System.out.println(reversed);

      }

}

 

 

Output:

IHG@FED#CBA