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Tip of the Day
Language: Java Language
Expertise: Beginner
Nov 5, 1999

Object Finalization

Question:
How can I finalize an object without waiting for the garbage collector?

Answer:
The System class contains a convenience method called gc() that can be used to ask the JVM to run the garbage collector. It also contains a method called runFinalization() which can be invoked to ask the JVM to perform all pending finalizations.

These methods are the equivalent of calling Runtime.getRuntime() and invoking the corresponding method on the resulting Runtime instance. To finalize objects that are no longer referenced, you would call System.gc() to find all unreferenced objects and then System.runFinalization() to perform finalizations. However, garbage collection and finalization are not guaranteed to have occurred after calling these methods. The methods only specify that the JVM will make a best effort to complete the requested actions.

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