Buy using stringBuffer and string equals method we can check try this following code

import java.util.Scanner;
import java.lang.*;
public class ReverseString{
public static void main (String[] args){
String inputString="";
int inputStringLength;
String reverseString="";
String stringHolder="";
//String reverseNumString = "";

Scanner in = new Scanner(System.in);
System.out.print("Enter a String: ");
inputString = in.next();
StringBuffer sb=new StringBuffer(inputString);
sb=sb.reverse();
if(inputString.equals(sb.toString()))
{
	System.out.println("palindrome");
}
else
{
	System.out.println("Not palindrome");
}

}//end main
} //end class