catching error in java

[nimish kumar]

Can we catch an Error occurred in a class by extending that class with Throwable. Since, Exception and error is the sub class of throwable.If yes/no- why?

[Kj Reddy]

You can catch anything that is Throwable which means you can catch Error. But an Error represents a serious problem and not advisable to catch.

From Java API:

"An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch. Most such errors are abnormal conditions. The ThreadDeath error, though a "normal" condition, is also a subclass of Error because most applications should not try to catch it. "

[nimish kumar]

Kj Reddy wrote:You can catch anything that is Throwable which means you can catch Error. But an Error represents a serious problem and not advisable to catch.

From Java API:

"An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch. Most such errors are abnormal conditions. The ThreadDeath error, though a "normal" condition, is also a subclass of Error because most applications should not try to catch it. "

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I didn't understand the reason why we should not catch? What is the reason for not catching the error?

[Kj Reddy]

nimish kumar wrote:

I didn't understand the reason why we should not catch? What is the reason for not catching the error?

Error represents some critical problem with your application. Fro example OutOfMemoryError will be thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector. So if by catching OutOfMemoryError will not solve your actual problems except increasing the memory and by catching this Error in program may not lead any solution and rather causes error prone application. So, it is not advisable to catch errors.

[David Newton]

This question is answerable locally, by writing test code: what happened when you tried it?

[nimish kumar]

David Newton wrote:This question is answerable locally, by writing test code: what happened when you tried it?

Haven't tried. Will try.. thanks for the answer to all.