type tInterruptHandler doesn't seem to exist

[derekwhite]

The "callback" version of requestInterrupts() was not fully implemented, but you should be able to use the synchronous version of requestInterrupts().

You can then have your interrupt handling code in a loop that first calls waitForInterrupt(). Roughly:

digIn.requestInterrupts();
while (true) { // or some condition
digIn.waitForInterrupt(300.0);

// ...do your interrupt handling code...

}
digIn.cancelInterrupts();

That loop can be pushed off to another Java thread.