Print image from a JPanel

[epots9]

I have no clue how to print, but i have this:

PrinterJob print = PrinterJob.getPrinterJob();
            boolean okToPrint = print.printDialog();
            if(okToPrint)
            {
                try
                {
                    print.print();
                }
                catch (PrinterException pe)
                {
                }
            }
 

I'm trying to print an image that is on a JPanel, the image is loaded and everything but nothing with print...i think i might be missing something.

open to all suggestions,
thank you.

[epots9]

An update, here is my actionlistener that is fired when the print menuitem is clicked:

private class PrintListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            PrinterJob printJob = PrinterJob.getPrinterJob();
            printJob.setPrintable(imageHolder);
            boolean okToPrint = printJob.printDialog();
            if(okToPrint)
            {
                try
                {
                    printJob.print();
                }
                catch (PrinterException pe)
                {
                    System.out.println("nope: " + pe);
                }
            }
        }
    }
 

the variable imageHolder is a JPanel, it is a class that extends JPanel and implements Printable. The overwritten method is:

public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
    {
        return 0;
    }
 

I'm still trying to figure out what does in there, because now i am able to print and it prints 1000+ (yes thats crazy) blank pages.

any ideas what i'm missing?

[Nepomuk]

An update, here is my actionlistener that is fired when the print menuitem is clicked:

private class PrintListener implements ActionListener
    {
        public void actionPerformed(ActionEvent e)
        {
            PrinterJob printJob = PrinterJob.getPrinterJob();
            printJob.setPrintable(imageHolder);
            boolean okToPrint = printJob.printDialog();
            if(okToPrint)
            {
                try
                {
                    printJob.print();
                }
                catch (PrinterException pe)
                {
                    System.out.println("nope: " + pe);
                }
            }
        }
    }
 

the variable imageHolder is a JPanel, it is a class that extends JPanel and implements Printable. The overwritten method is:

public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
    {
        return 0;
    }
 

I'm still trying to figure out what does in there, because now i am able to print and it prints 1000+ (yes thats crazy) blank pages.

any ideas what i'm missing?

What should the line PrinterJob printJob = PrinterJob.getPrinterJob(); do? As far as I can say, it should be something like

Toolkit tools = Toolkit.getDefaultToolkit(); 
PrintJob printJob = tools.getPrintJob( new Frame(), "", null ); 
 

or similar. Could it be, that something (e.g. the line from above) is putting the Printer into an infinite loop? That would of course explain the 1000+ pages.

Greetings,
Nepomuk

[epots9]

What should the line PrinterJob printJob = PrinterJob.getPrinterJob(); do? As far as I can say, it should be something like

Toolkit tools = Toolkit.getDefaultToolkit(); 
PrintJob printJob = tools.getPrintJob( new Frame(), "", null ); 
 

or similar. Could it be, that something (e.g. the line from above) is putting the Printer into an infinite loop? That would of course explain the 1000+ pages.

Greetings,
Nepomuk

According to the api, that is how i should create the printerjob object and not call the constructor directly.

[Nepomuk]

According to the api, that is how i should create the printerjob object and not call the constructor directly.

You mean the description of the constructor? Hm, you're right, it says it that way in this tutorial too. Hm, according to that Tutorial, it should work just fine... I'll have a look at it later, when I have more time and a printer to check it with. In the meantime, could you post the code which regulates, what should be printed? Maybe the error is not in the code you posted but somewhere else?

Greetings,
Nepomuk