Difference Between Final Finally And Finalize In Java
Understanding the Distinction Among final, finally, and finalize in Java
Difference Between Final Finally And Finalize In Java
In Java, “final” is a keyword used to declare that a variable is a constant and cannot be changed. It can be used with variables, methods, and classes to indicate that they are immutable. “finally” is a block used in exception handling in Java to execute a block of code regardless of whether an exception is thrown or not. It is typically used to release resources like closing files or database connections. On the other hand, “finalize” is a method in Java that is used for cleaning up resources before an object is garbage collected. It is called by the garbage collector before reclaiming the memory occupied by the object.
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1 - “final” is a keyword used in Java to define constants or to prevent inheritance, method overriding, or variable reassignment. It is used to make a variable, method, or class immutable. It indicates that the value of the variable cannot be changed once initialized.
2) “finally” is a block of code in exception handling that always gets executed, whether an exception is thrown or not. It is used to release resources, clean up operations, or execute important final statements.
3) “finalize” is a method in Java that is called by the garbage collector before reclaiming an object's memory. It may be used to perform cleanup operations or release resources before the object is garbage collected. However, it is generally not recommended to rely on finalize for resource cleanup.
4) While “final” is used for variables, methods, and classes, “finally” is used as a block of code in exception handling.
5) The “final” keyword is used at compile time to make a program robust and secure by declaring constants or defining immutability. On the other hand, “finally” block is used at runtime to ensure the execution of certain code regardless of exceptions.
6) The “finalize” method is called by the garbage collector at an undetermined time, and it is used for performing cleanup operations. Generally, it is discouraged to rely on the “finalize” method for resource cleanup due to its unpredictable nature.
7) Using “final” keyword ensures that the value of a variable does not change during the program's execution, providing better code predictability and security.
8) The “finally” block is commonly used for closing resources such as files or database connections, allowing for proper cleanup even in case of exceptions.
9) Avoiding reliance on the “finalize” method and instead using other resource management techniques like try with resources or manual cleanup in a well defined manner is generally considered a best practice in Java programming.
10) In summary, “final” is used to define constants or ensure immutability, “finally” is used for exception handling cleanup, and “finalize” is a method called by the garbage collector for object cleanup. Understanding and appropriately using these concepts in Java programs can lead to more efficient and robust code.
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