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Questions tagged [finalize]

A finalize() is a special method in an object-oriented language that is executed when an object is garbage collected.

A finalize(), or a finalizer, is a special method in an object-oriented language that is executed when an object is garbage collected.

Java Documentation (Javadoc) defines the moment when the finalize() is invoked as:

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

However, this may never happen in the life of a program if the object is always accessible. Due to the lack of programmer control over their execution, it is usually recommended to avoid finalizers for any but the most trivial operations.

Starting Java9. finalize() method has been officially deprecated. javadoc for Java9's java.lang.Object finalize()

228 questions
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Java finalizer guardian does not seem to work?

I have a super class with telescoping constructors with a finalize() method. To protect against subclasses forgetting to invoke super.finalize, I have written a finalizer guardian (EJ Item 7 ) like so. public class Super { public Super() {} …
Kal
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If Java's generational garbage collectors traverse the graph of live objects, how do they know which objects to call finalize() on?

My understanding is that GCs like ParallelGC and G1 are "generational" collectors. Garbage Collection almost happens as a byproduct, since you move all live objects to a new heap region and anything left in the old region will simply be overwritten.…
user7382368
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How to replace the deprecated finalize() method from a Java 11 project with inter - dependencies among classes

I have a Java 11 project involving multiple classes. In the present scenario, 2 of my classes - A and B - implement the java finalize() method, which is now deprecated for good. I understand the method may not be removed in the near future but I…
userAsh
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How can I provoke multiple calls to Finalize?

In a recent AdaCore Gem there's a statement The implementation of Finalize is slightly more complicated: the Ada reference manual indicates that a Finalize procedure should always be idempotent. An Ada compiler is free to call Finalize multiple…
Simon Wright
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PhantomReference with null queue

Java allow to write: new PhantomReference(new Object(), null) At this case new Object() will be collected? As I understand, phantom reference is alternative of finalize() method usage. And after appearing reference in queue, I need to do some…
gstackoverflow
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finalize() timed out after 30 seconds

I'm seeing few crashes in fabric which looks like this: Fatal Exception: java.util.concurrent.TimeoutException: android.text.TextPaint.finalize() timed out after 30 seconds at android.graphics.Paint.finalizer(Paint.java) at…
sider
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The cost of finalize in .Net

(1) I've read a lot of questions about IDisposable where the answers recommend not using Finalize unless you really need to because of the process time involved. What I haven't seen is how much this cost is and how often it's paid. Every…
Jules
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Why can I not get the PhantomReference from the ReferenceQueue for a finalizable object?

Here is my code public class FinalizableObject { @Override protected void finalize() throws Throwable { System.out.println("finalize() invoked for " + this); super.finalize(); } } public class Main { private static…
Devboard Fan
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Why do I need to call a close() or shutdown() method?

I'm new in Java with some background in C++ in my High School years. Now I'm trying to make something and I chose Java as the programming language. I've done my homework and look a lot about "destructors" for Java, finalize() method, and close() or…
user2292570
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Can other methods be called after finalize()?

If I have public class Foo { private boolean finalized = false; public void foo() { if (finalized) throw new IllegalStateException("finalize() has been called."); } @Override public void finalize() { …
Owen
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Do I need to implement a dispose or finalize in my objects?

For too long I let the garbage collector do its magic, removing all responsibilities from my self. Sadly it never turned into an issue... So I never gave a second thought to the subject. Now when I think about it I don't really understand what the…
Asaf
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Can finalize() method be overloaded in Java

I've read somewhere that every method can be overloaded. finalize() is a method of course. But while searching I also found that you cannot overload this method. So the Question is Can we overload the finalize() method? If yes then how is it…
Saif
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Does Garbage Collector ignores Exception

I was reading that Any Exception thrown by finalize method is ignored by GC thread and it will not be propagated further but what is the reason for ignoring Exception by GC. Also finalization of that object terminates, does that means, that object…
Vishrant
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Why I have access to finalize() method in other sub class of another package?

I new to Java First time I am trying to learn Java . My simple Question is on finalize () method in java.lang.Object. Why I have access to this only protected method in my other class not other protected method .My tutor told me that protected only…
Java_begins
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How to finalize record passed through the untyped parameter of a function?

Can I pass "any" record type to my procedure ? Many times I used "records" with strings. type TR = record a: string; b: string; end; To clear them, I need to write: Finalize(R); FillChar(R, SizeOf(R), #0); The question is that how to…
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