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What is the purpose of finalize ()?

Programming languages are the mainstay of technological development. These languages provide the software for these devices and are written in code. This...

Finalize Method

Programming languages are the mainstay of technological development. These languages provide the software for these devices and are written in code. This code is then paired with the hardware to create the final gadget. Java is a prevalent language used by millions worldwide. Beginners and veterans use Java to create applications and software. This programming language is highly optimized, giving the user a smooth experience. Java programming language greatly emphasizes the concept of Object Oriented Programming. You must know various concepts if you are new to the realm of Java programming. One of them is the finalize method in Java. In this blog, we will learn all about the purpose of the finalize method in Java and its applications, We will also delve into the concept of Java code compilers and their uses in programming. So, let us delve into Java programming and better our skills together.

What is the finalize method?

The finalize method in Java is a non-static and protected method belonging to Java. lang. Object class. It serves as the superclass for all Java classes. Because of this, the finalize method is accessible to every class in Java. Its primary purpose is to allow the Garbage collector to invoke it on any Java object as part of a cleanup process before the object is deleted.

In Java finalize() method isn’t a reserved keyword but a method. This function is required to release any resources an object has before the Garbage collector removes it from memory. Once the finalize method completes its cleanup tasks, the Garbage collector disposes of the Java object.

Notably, in Java, the JVM (Java Virtual Machine) allows the finalize method to be invoked only once per object. After the finalize method executes, the JVM sets a flag in the object header, indicating that it has undergone finalization and should not be finalized again. The JVM will simply disregard the request if a user calls the finalize method on the same object a second time. Here is the syntax for the finalize method in Java

protected void finalize() throws Throwable{}

What is garbage collection in Java?

Garbage collection in Java stands as a crucial, automated process. This automated cleanup scans the heap, seeking out no longer-needed objects. Once an object no longer finds any references within the application, the collector swiftly takes action, removing the object and, as a result, freeing up valuable memory space within the heap. This process continues systematically until all the unused objects have been successfully reclaimed. It’s a silent hero behind the scenes, ensuring your Java applications run efficiently without memory leaks or unnecessary resource consumption.

Thanks to Java’s robust garbage collection system, developers can focus on writing code without worrying about manual memory management.

Uses of finalize method

The finalize method in Java is primarily related to resource management and cleanup activities before an object is garbage collected. Here are its major uses:

Resource cleanup:

The primary reason for finalize method lies in the meticulous release of resources tethered to an object, such as file handles. This guarantees the proper closure of resources when the object lapses into obsolescence.

Memory Reclamation:

Finalize allows for the intentional release of object memory, making it available for garbage collection, which is especially useful in situations where strict memory management is required.

Extricating from External Interfaces:

In cases where an object interfaces with external systems, e.g., databases or devices, finalize serves as a graceful disconnection, stopping resource leakage.

Custom Cleanup Logic:

Developers may implement custom cleanup logic within finalize, comprising activities such as log entry generation or cached data release, to ensure object integrity before destruction.

Clean Thread Termination:

Finalize may be deployed to judiciously terminate threads or tasks associated with an object, ensuring their stoppage upon object collection.

File Closure:

Objects tasked with the management of open files, especially in the realm of input/output (I/O) operations, employ finalisation to ensure the proper closure of files, thwarting potential file access anomalies.

Native Resource Disengagement:

In cases where objects interact with native resources via the Java Native Interface (JNI), finalize can be harnessed to release these native resources explicitly.

Database Connection Pooling:

In database connection pooling, finalize facilitates the responsible return of connections to the pool when objects denoting database connections are no longer required.

Resource Monitoring:

The finalised method can be utilized for logging or monitoring resource utilization statistics, thereby assisting in performance analysis and debugging endeavours.

Integration with Legacy Code:

In scenarios where older codebases or libraries don’t use modern management practices, finalize can serve as a good mechanism for resource cleanup.

What is a Java code compiler?

A Java code compiler is specifically designed for the Java programming language. It typically generates Java class files that contain platform-neutral Java bytecode.

It interprets and translates the written code from human-understandable text to machine-understandable code and allows for the execution of various functions.

Some code compilers, however, can produce optimized native machine code tailored for specific hardware and operating system combinations.

Uses of Java code compilers

Java code compilers are very useful in programming. Some key uses are listed below:

  • The Java code compiler translates Java source code into bytecode.
  • Java code compiler checks for syntax errors and issues during compilation.
  • Generates platform-independent bytecode for execution on the JVM.
  • Java code compiler optimises application performance.
  • Handles dependencies and links external libraries.
  • Creates Java Archive (JAR) files for distribution.
  • Generates documentation (JavaDoc) from code comments.
  • Java code compiler enforces access controls and security.
  • Supports cross-compilation for different JVM versions.


The finalize method in Java serves a vital purpose. It ensures that resources are properly cleaned up. This action prevents waste and inefficiency. The function method acts as a digital janitor. It cleans up after your code and improves its efficiency. Java code compilers interpret and translate written code from human-understandable text to machine-understandable code. This is necessary for program functioning. Hope this guide helped you gain valuable insights about the finalized method. 

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