Selenium : Printing name in the form of a triangle

Printing name in the form of a triangle

import javax.swing.JOptionPane; 
import javax.swing.Spring;
import org.apache.commons.lang3.StringUtils;
public class Triangle
{

 public static void main(String[] args)
 {
  String res="";
  String fin="";
  String a=JOptionPane.showInputDialog(null,"What is your name ?"); 

  if ( a.length() % 2 != 0)
  {
   a=a+"_";
  }


  for (int len=1 ; len<= a.length() ; len++)
  {
   res=StringUtils.leftPad(a.substring(0, len), a.length())+"\n";
   fin=fin+res;
  }
  JOptionPane.showMessageDialog(null, fin);

 }
}