Question

Question:

Concepts

StringBuilder

Var-Args

Programming Assignment

Palindrome Checker - A palindrome is a string that is the same forwards as backwards. For example, the following strings are palindromes:

" ", "a", "aa", "bb", "aba", "bab", "bob"

These are not:

"ab", "ba", "bba", "abb"

Use StringBuilder concept to create a palindrome checker. The method will be called palindromChecker and it will use the var-arg concept to accept 1 to many Strings. The class name for this program is Palindrome.

Answer 1

Solution for the given questions are as follows -

Code :

import java.util.*;
class Palindrome
{
   // palindromChecker variable number of String arguments.
   // a is Var-Args
   static void palindromChecker(String ...a)
   {
   // declaring two StringBuilder objects to store strings
   StringBuilder palindrome = new StringBuilder();
   StringBuilder notpalindrome = new StringBuilder();
   //for loop over strings arguments
       for (String i: a) {
       // creating StringBuilder object
       StringBuilder str = new StringBuilder(i);
       // reverse String
       StringBuilder reverseString = str.reverse();
       // convert StringBuilder to String
       String rev =reverseString.toString();
       // check string is palindrome or not and append strings to StringBuilder objects
           if (i.equals(rev)) {
           palindrome.append(i + " ");
           } else {
           notpalindrome.append(i + " ");
           }
       }
       // print the final results
       System.out.println("Palindrome Strings : "+ palindrome);
       System.out.println("Not Palindrome Strings : "+ notpalindrome);
   }
   public static void main(String args[])
   {
       // palindromChecker ("aba");       // one parameter
       // palindromChecker ("aba", "dvd"); // two parameter
       palindromChecker ("abc","ab","madam","mno"); // four parameters
   }
}

Code Screen Shot :

Output :