Create java image from Jpanel without displaying

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Moth - 02 Dec 2003 21:13 GMT

I have a PlotPanel class that extends JPanel which I have used previously to
display charts in swing guis. I now want to display a graph in a jsp page
so I was going to generate the graph and then save it to a jpeg and then
display it in the page.

Is there anyway to create an Image from a JPanel without actually displaying
it in a JFrame first? Can anyone suggest a better way to create a chart
image for servlet/jsp?

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ak - 05 Dec 2003 07:13 GMT

> Is there anyway to create an Image from a JPanel without actually displaying
> it in a JFrame first?

forget JPanel - create BufferedImage and get Graphics from it. Draw your
graph to this Graphics.

> so I was going to generate the graph and then save it to a jpeg and then
> display it in the page.

Use ImageIO to save image.

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http://reader.imagero.com the best java image reader.

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