What will happen if an exception is Rethrown in the catch?

What will happen if an exception is Rethrown in the catch?

An exception can be rethrown in a catch block. This action will cause the exception to be passed to the calling method. If the rethrow operation occurs in the main method then the exception is passed to the JVM and displayed on the console.

Can an exception be Rethrown?

If a catch block cannot handle the particular exception it has caught, you can rethrow the exception. The rethrow expression ( throw without assignment_expression) causes the originally thrown object to be rethrown.

Does finally execute if catch throws exception?

A finally block always executes, regardless of whether an exception is thrown. The following code example uses a try / catch block to catch an ArgumentOutOfRangeException.

How catch exception is different from finally?

Catch block contains the exception handler for exceptions in the try block. The finally block contains the critical code that will execute regardless of whether the exception has occurred or not.

What keyword is used to re throw an exception?

throw keyword
When an exception is cached in a catch block, you can re-throw it using the throw keyword (which is used to throw the exception objects). Or, wrap it within a new exception and throw it.

How do you Rethrow the same exception?

Rule: When rethrowing the same exception, use the throw keyword by itself.

Is finally block executes if there is no exception?

Yes, the finally block is always get executed unless there is an abnormal program termination either resulting from a JVM crash or from a call to System. A finally block is always get executed whether the exception has occurred or not.

Is finally called after catch?

The code in the finally block will get called before the exception is rethrown from the catch block. This ensures that any cleanup code that you’ve put in the finally block gets called.

Why do you catch and rethrow an exception?

Such an approach is semantically better than a catch / throw, but is ugly and is less maintainable than it should be. While many of the other answers provide good examples of why you might want to catch an rethrow an exception, no one seems to have mentioned a ‘finally’ scenario.

How to retrace an exception thrown in catch and finally?

Now retrace the execution remembering that, whenever you hit throw, you should abort tracing the current exception and start tracing the new exception. Exceptions in the finally block supersede exceptions in the catch block.

When is finally run if you throw an exception from?

It would be called after e is re-thrown (i.e. after the catch block is executed) editing this 7 years later – one important note is that if e is not caught by a try/catch block further up the call stack or handled by a global exception handler, then the finally block may never execute at all.

What happens when an exception is thrown in a catch block?

When a new exception is thrown in a catch block, the new exception is still subject to that catch’s finally block, if any. Now retrace the execution remembering that, whenever you hit throw, you should abort tracing the current exception and start tracing the new exception.