I need to find when finalized method called in the JVM. I Created a test Class which write into file when finalized method called by Overriding the protected finalize method It is not executing. Can anybody tell me the reason why it is not executing?? Thanks in Advance

No, there's no such thing built into Java. The closest is to write a finalizer, but there's no guarantee that it'll run. How is a Session destroyed? If there's a method called, by all means put the code there. How do you create a Session? If you do it within a try/catch block, you can clean ...

Is there a destructor for Java? I don't seem to be able to find any documentation on this. If there isn't, how can I achieve the same effect? To make my question more specific, I am writing an application that deals with data, and the specification say that there should be a 'reset' button that ...

Because Java is a garbage collected language you cannot predict when (or even if) an object will be destroyed. Hence there is no direct equivalent of a destructor. There is an inherited method called finalize, but this is called entirely at the discretion of the garbage collector. So for classes...

I've been reading through a lot of the rookie Java questions on finalize() and find it kind of bewildering that no one has really made it plain that finalize() is an unreliable way to clean up resources. I saw someone comment that they use it to clean up Connections, which is really scary since ...

You could use it as a backstop for an object holding an external resource (socket, file, etc). Implement a close() method and document that it needs to be called. Implement finalize() to do the close() processing if you detect it hasn't been done. Maybe with something dumped to stderr to point...

finalize() is a hint to the JVM that it might be nice to execute your code at an unspecified time. This is good when you want code to mysteriously fail to run. Doing anything significant in finalizers (basically anything except logging) is also good in three situations: you want to gamble that...

A simple rule: never use finalizers. The fact alone that an object has a finalizer (regardless what code it executes) is enough to cause considerable overhead for garbage collection. From an article by Brian Goetz: Objects with finalizers (those that have a non-trivial finalize() method) ...

From Java 7, the best practice for closing a resource is to use a try-with-resource : http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html

No, that is not "best practice", or even "passable practice". You have no guarantee when if at all finalizers are called, so it won't work. Instead you should scope out resources to a block, like this: try { acquire resource } finally { if (resource was acquired) release it }

Java doesn't have any concept of native pointer, so storing it as a long is the only real option. But you should not rely on finalize to free the pointer; the finalize method is unreliable as a means of cleaning up resources. See this question for further details.

panic/recover is moral equivalent of try/catch exceptions. There is superficial difference (syntax) and a subtle, but important, difference of intended use. The best explanations of problems with exceptions in general is "Cleaner, more elegant, wrong" and that's a good overview of pros/cons of e...

I'd like to know do I need to write destructor in classes when I don't use raw pointers anymore? Just boost smart pointers.