Java Exception vs C++ Exceptions

Question

Where are exceptions stored ? Stack, Heap. How is memory allocated and deallocated for Exceptions? Now if you have more than one exception which needs to be handled are the

Answer 1

For the most complete information on exceptions, we can go directly to the source: Chapter 11: Exceptions of The Java Language Specification, Second Edition.

Exceptions are indeed objects. They are a subclass of Throwable:

Every exception is represented by an instance of the class Throwable or one of its subclasses; such an object can be used to carry information from the point at which an exception occurs to the handler that catches it.

Therefore, it would probably be safe to assume, that as with any other Object in Java, it will be allocated on the heap.

In terms of having mulitple Exception objects, that probably wouldn't be the case, as once an exception occurs, the Java Virtual Machine will start to find an exception handler.

During the process of throwing an exception, the Java virtual machine abruptly completes, one by one, any expressions, statements, method and constructor invocations, initializers, and field initialization expressions that have begun but not completed execution in the current thread. This process continues until a handler is found that indicates that it handles that particular exception by naming the class of the exception or a superclass of the class of the exception.

For more information on how exceptions are to be handled at runtime, Section 11.3 Handling of an Exception has the details.