Difference between using Throwable and Exception in a try catch

Question

Sometimes  I see  try      catch Throwable e         And sometimes  try      catch Exception e         What is the difference

User · Answer

Throwable is super class of Exception as well as Error  In normal cases we should always catch sub-classes of Exception  so that the root cause doesn t get lost    Only special cases where you see possibility of things going wrong which is not in control of your Java code  you should catch Error or Throwable       I remember catching Throwable to flag that a native library is not loaded

User · Answer

I have seen people use Throwable to catch some errors that might happen due to infra failure  non availability

User · Answer

Thowable catches really everything even ThreadDeath which gets thrown by default to stop a thread from the now deprecated Thread stop   method  So by catching Throwable you can be sure that you ll never leave the try block without at least going through your catch block  but you should be prepared to also handle OutOfMemoryError and InternalError or StackOverflowError   Catching Throwable is most useful for outer server loops that delegate all sorts of requests to outside code but may itself never terminate to keep the service alive

User · Answer

The first one catches all subclasses of Throwable  this includes Exception and Error   the second one catches all subclasses of Exception   Error is programmatically unrecoverable in any way and is usually not to be caught  except for logging purposes  which passes it through again   Exception is programmatically recoverable  Its subclass RuntimeException indicates a programming error and is usually not to be caught as well

User · Answer

By catching Throwable it includes things that subclass Error  You should generally not do that  except perhaps at the very highest  catch all  level of a thread where you want to log or otherwise handle absolutely everything that can go wrong  It would be more typical in a framework type application  for example an application server or a testing framework  where it can be running unknown code and should not be affected by anything that goes wrong with that code  as much as possible

[java] Difference between using Throwable and Exception in a try catch

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