cannot be cast to javax.swing.JPanel

[k elzhar]

Helo, i have problem to render 3d graph

here my code..

/*
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package app;
import javax.swing.JComponent;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import org.jzy3d.chart.Chart;
import org.jzy3d.colors.Color;
import org.jzy3d.colors.ColorMapper;
import org.jzy3d.colors.colormaps.ColorMapRainbow;
import org.jzy3d.maths.Range;
import org.jzy3d.plot3d.builder.Builder;
import org.jzy3d.plot3d.builder.Mapper;
import org.jzy3d.plot3d.builder.concrete.OrthonormalGrid;
import org.jzy3d.plot3d.primitives.Shape;
import org.jzy3d.plot3d.rendering.canvas.*;
import org.jzy3d.plot3d.rendering.canvas.CanvasAWT;
import org.jzy3d.bridge.*;



/**
 *
 * @author kael
 */
public class App extends javax.swing.JFrame {
    private final JPanel panel1 = new JPanel();
    private final JPanel panel2 = new JPanel();
    private final JPanel panel3 = new JPanel();
    private final JLabel Banner = new JLabel("Environmental Degrading");
    private final JLabel s1 = new JLabel("Rate Degrading For Jan");
    JLabel s2 = new JLabel("Rate Degrading For Dec");
    JTextField s1text = new JTextField(2);
    JTextField s2text = new JTextField(2);
    JButton Intro = new JButton("Introduction");
    JButton Calc = new JButton("Calculate");
      JPanel contentPane = new JPanel(new BorderLayout());
      private final JPanel paneljan = new JPanel();
      private final JPanel paneldec = new JPanel();
       private final JPanel panelIntro = new JPanel();
       private final JPanel graphpanel = new JPanel();
       
     
public App() {
    mainGUI();
              Mapper mapper = new Mapper() {
            public double f(double x, double y) {
                return x * Math.sin(x * y);
            }
        };

        // Define range and precision for the function to plot
        Range range = new Range(-3, 3);
        int steps = 80;

        // Create the object to represent the function over the given range.
            final Shape surface = Builder.buildOrthonormal(new OrthonormalGrid(range, steps, range, steps), mapper);
        surface.setColorMapper(new ColorMapper(new ColorMapRainbow(), surface.getBounds().getZmin(), surface.getBounds().getZmax(), new Color(1, 1, 1, .5f)));
        surface.setFaceDisplayed(true);
        surface.setWireframeDisplayed(false);
panelIntro.setLayout(new java.awt.BorderLayout());
Chart chart = new Chart(Quality.Advanced, "swing");
        chart.getScene().getGraph().add(surface);
        chart.render();


       
panelIntro.add((JPanel)chart.getCanvas());
        //panelIntro.setPreferredSize(new Dimension(300,300));


}

 
public void mainGUI(){

   Calc.addActionListener(new ActionListener() {
       

       @Override
       public void actionPerformed(ActionEvent e) {
           panelIntro.setVisible(false);
         panel2.setVisible(true);
       }
    });
   
   Intro.addActionListener(new ActionListener() {
       

       @Override
       public void actionPerformed(ActionEvent e) {
           panelIntro.setVisible(true);
         panel2.setVisible(false);
       }
    });
   
    paneljan.setLayout(new FlowLayout());
    paneldec.setLayout(new FlowLayout());
    paneljan.add(s1);
    paneljan.add(s1text);
    paneldec.add(s2);
    paneldec.add(s2text);
    panel3.add(Banner, rootPane);
    panel2.add(paneljan);
    panel2.add(paneldec);
    panel2.setLayout(new GridLayout(12,2,2,1));
 
    panel1.setLayout(new GridLayout(12,2,2,1));
    panel1.add(Intro);
    panel1.add(Calc);
    panel1.setAlignmentX(Component.CENTER_ALIGNMENT);
    s1text.setEditable(true);
    s2text.setEditable(true);
    panel2.setVisible(false);
   
   
   JPanel contentPane = new JPanel(new BorderLayout());
//contentPane.setBorder();
contentPane.add(panel1, BorderLayout.LINE_START);
contentPane.add(panelIntro, BorderLayout.CENTER);
contentPane.add(panel2, BorderLayout.CENTER);
contentPane.add(panel3, BorderLayout.PAGE_START);
this.add(contentPane);
 
}

public void Calc(){
 
}
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        // TODO code application logic here
       
       App newapp = new App();
       newapp.setVisible(true);
       newapp.setSize(800,600);
       newapp.setDefaultCloseOperation(EXIT_ON_CLOSE);
       //newapp.remove(panel2);
    }
   
}

Here error..

Exception in thread "main" java.lang.ClassCastException: org.jzy3d.plot3d.rendering.canvas.VoidCanvas cannot be cast to javax.swing.JPanel
    at app.App.<init>(App.java:74)
    at app.App.main(App.java:142)
Java Result: 1

hope someone can help me about this.. thanks

best regards,
kael

[Chris Foley]

panelIntro.add((JPanel)chart.getCanvas());

I think you need to cast it to a Component:

panelIntro.add((Component)chart.getCanvas());

[k elzhar]

same sir
still error..


org.jzy3d.plot3d.rendering.canvas.VoidCanvas cannot be cast to java.awt.Component

[Chris Foley]

That rings a bell. I think I got around it by using and "awt" chart instead of "swing"

[k elzhar]

On Monday, 14 April 2014 22:27:16 UTC+8, Chris Foley wrote:

That rings a bell. I think I got around it by using and "awt" chart instead of "swing"

error also.. i think miss other part