Mebalik kata pake java

import java.io.*;
import java.util.StringTokenizer;
class membalik_kata{
   public static void main(String[] args)throws IOException
   {
   
    String kalimat;
    BufferedReader kata=new BufferedReader(new InputStreamReader(System.in));
    System.out.print("Ketik Kata: ");
    kalimat=kata.readLine();
    StringTokenizer st = new StringTokenizer(kalimat);
    while (st.hasMoreTokens())
     {
        
      System.out.print(st.nextToken());
    }
}
}