Java FocusTraversalPolicy get component by focus sequence

import java.awt.Component;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.FocusTraversalPolicy;
import java.awt.KeyboardFocusManager;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Main {
   public static void main(String[] argv) {
      JFrame frame = new JFrame();
      JButton component1 = new JButton("1");
      JButton component2 = new JButton("2");
      JButton component3 = new JButton("3");

      frame.setLayout(new FlowLayout());
      frame.add(component1);/*from w ww  .  j  a v  a 2s  .c o m*/
      frame.add(component2);
      frame.add(component3);

      frame.pack();
      frame.setVisible(true);

      System.out.println(findNextFocus().getName());
   }

   public static Component findNextFocus() {
      Component c = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
      Container root = c.getFocusCycleRootAncestor();

      FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
      Component nextFocus = policy.getComponentAfter(root, c);
      if (nextFocus == null) {
         nextFocus = policy.getDefaultComponent(root);
      }
      return nextFocus;
   }
}