🚫 When Should You Use finalize() in Java?

rahul khattri — Wed, 03 Sep 2025 18:06:28 +0000

TL;DR: Never!

The finalize() method in Java was originally designed to let developers clean up resources before an object is reclaimed by the Garbage Collector.

But here’s the catch:

⚠️ It is not guaranteed to be called.

⚠️ Its execution is totally unpredictable.

⚠️ Relying on it means your resources (like file handles, DB connections, sockets) may never actually close.

Instead of finalize(), the modern and reliable approach is:

✅ Try-with-resources (introduced in Java 7):

try (FileInputStream fis = new FileInputStream("data.txt")) { // use the resource } catch (IOException e) { e.printStackTrace(); }

This ensures that resources are automatically closed once the block is done — no surprises, no waiting for the GC.

DEV Community: rahul khattri