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When the Finalize() Method Executes in Java
The finalize() method of a class in Java is invoked when an object of that class is scheduled for garbage collection. Despite this knowledge, a custom implementation of the method may fail to execute in testing environments.
Understanding Finalize() Execution
The key to understanding the behavior of finalize() lies in the garbage collection process. An object becomes eligible for garbage collection when:
However, the timing of when an object is actually collected is non-deterministic and varies depending on the JVM implementation. As a result, finalize() can be called at seemingly random times or not at all.
Pitfalls of Relying on Finalize()
Overriding finalize() for the purpose of performing essential application cleanup is strongly discouraged. The method has several limitations and drawbacks:
Alternative Cleanup Techniques
Instead of using finalize() for cleanup, consider the following techniques:
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