Unreachable object in JAVA

Hi Mohan YES, Finalization is a feature of the Java programming language that allows you to perform postmortem cleanup on objects that the garbage collector has found to be unreachable. It is typically used to reclaim native resources associated with an object. When the garbage collector determines that obj is unreachable, it notices that obj is finalizable -- as it had been recorded upon allocation -- and adds it to the JVM's finalization queue. It also ensures that all objects reachable from obj are retained, even if they are otherwise unreachable, as they might be accessed by the finalizer. So, we can say that it can be reachable.

Although it's not really a good idea to do so, you can make an unreachable object reachable again by overriding the finalize method in its class and assigning the 'this' reference to some external variable.