java programing with hardware

just wanted to know if it is possible to send int开发者_开发技巧errupts to a java code which is running in background or foreground(with no console), whenever there is a key stroke

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Do you mean, can the console be used in a non-line-buffering mode?

In that case, you can't do it with pure Java. You can do it with a fairly simple JNI library and if you google there may be an open source one available.