Thread: my jtable image dosen't appear

Greeting all,
i want to convert the JTable to an Image using the method "createImage", but the jtable image doesn't appears i tried to figure out but no result at all..
thanks for any help.

        public class JTableImageCreator extends JPanel
{
     public JTableImageCreator() {
        setBorder(BorderFactory.createLineBorder(Color.black));
    }
 
       public Dimension getPreferredSize() {
        return new Dimension(250,200);
    }
 
      public void paintComponent(Graphics2D g) {
        super.paintComponent(g);       
       BufferedImage table = createImage(getTable());
        g.drawImage(table, 0, 0, 100, 100 , null);
    }   
 
 
 
 
    public JTable getTable()
    {
     String[] columns = {"ColumnA", "ColumnB", "ColumnC"};
 
 
           Object[][] data = {
              {"A", new Integer(60), new Boolean(true)},
              {"B", new Integer(60), new Boolean(true)},
              {"C", new Integer(60), new Boolean(true)},
              {"D", new Integer(60), new Boolean(true)} };
 
    return new JTable(data,columns);
 
    }
 
    /**
     * This method takes a JTable and returns a BufferedImage of it
     * 
     * @param table 
     * @return BufferedImage of JTable
     */
    public static BufferedImage createImage(JTable table)
    {
        //get the table header component
        JTableHeader tableHeaderComp = table.getTableHeader();
 
        //Calculate the total width and height of thr table iwth the header
        int totalWidth = tableHeaderComp.getWidth() + table.getWidth();
        int totalHeight = tableHeaderComp.getHeight() + table.getHeight();
 
        //create a BufferedImage object of total width and height
        BufferedImage tableImage = new BufferedImage(totalWidth, totalHeight, BufferedImage.TYPE_INT_RGB);
 
        //get the graphics object from the image
        Graphics2D g2D = (Graphics2D)tableImage.getGraphics();
 
        //paint the table header on image graphics
        tableHeaderComp.paint(g2D);
 
        //now translate the origin to (0, height of table header)
        g2D.translate(0, tableHeaderComp.getHeight());
 
        //now paint the table on the image graphics
        table.paint(g2D);
 
        //return the table image
        return tableImage; 
    }
     public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI(); 
            }
        });
    }
 
    private static void createAndShowGUI() {
        System.out.println("Created GUI on EDT? "+
        SwingUtilities.isEventDispatchThread());
        JFrame f = new JFrame("Swing Paint Demo");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       // f.add(new JTableImageCreator());
        f.getContentPane().add(new JTableImageCreator());
        f.pack();
        f.setVisible(true);
    }
}

That is NOT the way to do painting. I suggest you read this: Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing)

But really, what you're looking for is probably a table renderer. They are covered here: How to Use Tables (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

Check the methods you override - there is one in particular which is not actually overriding the parent method (eg paintComponent). For what its worth, using the @Override annotation would have caught this at compile time.

I do hope this example was for demonstration purposes only - as while I don't see anything wrong with drawing to the BufferedImage portion of the code, drawing the JPanel is a different matter entirely - as recreating the table, changing the table to an image, and drawing said image for every call to paintComponent is not a great way to render the JTable in a JPanel.