Polygon

 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.vtkActor;
import vtk.vtkCellArray;
import vtk.vtkNativeLibrary;
import vtk.vtkPanel;
import vtk.vtkPoints;
import vtk.vtkPolyData;
import vtk.vtkPolyDataMapper;
import vtk.vtkPolygon;
import vtk.vtkNamedColors;




//Author: Bharatesh Chakravarthi
//Affiliation: VE Lab, Chung Ang University, Seoul, South Korea. 


public class Polygon 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 Polygon() {
        super(new BorderLayout());

      vtkPoints Points = new vtkPoints();
      Points.InsertNextPoint(0.0,0.0,0.0);
      Points.InsertNextPoint(1.0,0.0,0.0);
      Points.InsertNextPoint(1.0,1.0,0.0);
      Points.InsertNextPoint(0.0,1.0,0.0);


      vtkPolygon Polygon = new vtkPolygon();
      Polygon.GetPointIds().SetNumberOfIds(4);
      Polygon.GetPointIds().SetId(0, 0);
      Polygon.GetPointIds().SetId(1, 1);
      Polygon.GetPointIds().SetId(2, 2);
      Polygon.GetPointIds().SetId(3, 3);


      vtkCellArray Polygons = new vtkCellArray();
      Polygons.InsertNextCell(Polygon);


      vtkPolyData PolygonPolyData = new vtkPolyData();
      PolygonPolyData.SetPoints(Points);
      PolygonPolyData.SetPolys(Polygons);


      //Create a Mapper and Actor
      vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
      Mapper.SetInputData(PolygonPolyData);


      vtkActor Actor = new vtkActor();
      Actor.SetMapper(Mapper);
     Actor.GetProperty().SetColor(1.0, 0.0, 0.1); 
     Actor.GetProperty().SetLineWidth(5);

      renWin = new vtkPanel();

      renWin.GetRenderer().AddActor(Actor);
      renWin.resetCamera();
      renWin.GetRenderer().SetBackground(1.0, 1.0, 1.0);

      // 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("Polygon");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.getContentPane().setLayout(new BorderLayout());
            frame.getContentPane().add(new Polygon(), BorderLayout.CENTER);
            frame.setSize(400, 400);
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);
          }
        });
      }
    }