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Chained Exceptions!
With Java 2, exception susbsystem has a new feature: Chained Exception. This feature allows you to associate another exception with an exception. The 2nd exception describes cause of first exception.
Following example demonstrates this concept:
try {
// some code (optional)
} catch (ArithmeticException AE) {
throw new DummyException("Another ArithmeticException", AE);
}
Here when an ArithmeticException occurs, a new DummyException exception is created with the original cause and the chain of exceptions is handed over to the parent exception handler.