Is there a way for a Java application to detect if the screen is locked?

Question

I\'m looking for a way to know in a Java application (without JNI - it\'s a multi-platform application) can detect if the screen is locked.

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Answer 1

I don't think there is an API for that or even a way to do it all. Parsing screenshots generated by java.awt.Robot is neither platform- nor version- or even configuration-independant, and in general, I don't think "screen is locked" is a well-enough defined concept to be used in this sense - on Linux, there can be more than just one "screen" (X server), you can switch to console terminals, you can have applications running one (or more) machines display their GUIs on another machine over the network...