import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import vtk.vtkLight;
import vtk.vtkLightActor;
import vtk.vtkNativeLibrary;
import vtk.vtkPanel;


public class LightActor extends JPanel implements ActionListener {
	  private static final long serialVersionUID = 1L;
	  private vtkPanel renWin;
	  private JButton exitButton;

	  // -----------------------------------------------------------------
	  // Load VTK library and print which library was not properly loaded
	  static {
	    if (!vtkNativeLibrary.LoadAllNativeLibraries()) {
	      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) {
	        if (!lib.IsLoaded()) {
	          System.out.println(lib.GetLibraryName() + " not loaded");
	        }
	      }
	    }
	    vtkNativeLibrary.DisableOutputWindow(null);
	  }
	  // -----------------------------------------------------------------
	  
	  
	  public LightActor() {
	    super(new BorderLayout());

    	 // Display where the light is  
	  vtkLight Light = new vtkLight();
	  Light.SetPositional(1);
	  
	  vtkLightActor LightActor = new vtkLightActor();
	  LightActor.SetLight(Light);
 
	  renWin = new vtkPanel();
	  renWin.GetRenderer().AddActor(LightActor);
	  renWin.GetRenderer().AddViewProp(LightActor);
	  renWin.resetCamera();
	 

	  // Add Java UI components
	  exitButton = new JButton("Exit");
	  exitButton.addActionListener(this);

	  add(renWin, BorderLayout.CENTER);
	  add(exitButton, BorderLayout.SOUTH);
	  }

	  /** An ActionListener that listens to the button. */
	  public void actionPerformed(ActionEvent e) {
	    if (e.getSource().equals(exitButton)) {
	      System.exit(0);
	    }
	  }

	  public static void main(String s[]) {
	    SwingUtilities.invokeLater(new Runnable() {
	      public void run() {
	        JFrame frame = new JFrame("Light Actor");
	        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	        frame.getContentPane().setLayout(new BorderLayout());
	        frame.getContentPane().add(new LightActor(), BorderLayout.CENTER);
	        frame.setSize(400, 400);
	        frame.setLocationRelativeTo(null);
	        frame.setVisible(true);
	      }
	    });
	  }
	} 

Create LightActor.java