java.awt.HeadlessException thrown from HeadlessGraphicsEnvironment.getDefaultScreenDevice

Question

I need to do some image processing on a java server (Debian with java version \"1.6.0_12\"), and I am receiving java.awt.HeadlessException from my code:

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Answer 1

Your code appears to be getting the default graphics device configuration on a machine that doesn't have a usable graphic device. This doesn't make much sense, and is never going to work.

If you could explain why you are trying to do this (on a headless machine) we might be able to offer an alternative.

Answer 2

When headless you don't have a screen device. The documentation is clear:

Throws: HeadlessException - if isHeadless() returns true