LightActor

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);
          }
        });
      }
    }