I have tested for almost all test cases intentioned in discussions.
what might be the problem ?? ple help
code :
/*
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 * and open the template in the editor.
 */
package timusonlinejudge;

import java.util.Scanner;

/**
 *
 * @author dell
 */
public class N1297 {
    public String getPal(String s, int i, int j,String result){
        while((i>=0)&&(j<=s.length()-1)){
            if((""+s.charAt(i)).equalsIgnoreCase(""+s.charAt(j))){
                result = s.charAt(i)+result+s.charAt(j);
                i--;j++;
            }
            else{
               break;
            }
        }
        return result;
    }
    public String longestPal(String s){
       // System.out.println("---");
        if(s.isEmpty()){
            return "";
        }
        String result = s.substring(0,1);

        //System.out.println("---"+result);
        for(int i = 1; i<s.length();i++){
            if((""+s.charAt(i-1)).equalsIgnoreCase(""+s.charAt(i))){
                String temp = getPal(s,i-1,i,"");
                //System.out.println(temp);
                if(temp.length()>result.length()){
                    result = new String(temp);
                    //System.out.println(temp);
                }
            }

                String temp = getPal(s,i-1,i+1,""+s.charAt(i));
                //System.out.println(temp);
                if(temp.length()>result.length()){
                    result = new String(temp);
                    //System.out.println(temp);
                }

        }
      return result;
    }
     public static void main(String[] args) {
        N1297 main = new N1297();
        Scanner sc = new Scanner(System.in);

        String input = sc.nextLine();
        //System.out.println(input);
        System.out.println(main.longestPal(input));

        // TODO code application logic here
    }

}