Difference Between Final And Finally Keyword In Java
distinguishing the final and finally keywords in Java
Difference Between Final And Finally Keyword In Java
In Java, the “final” keyword is used to restrict the modification of classes, methods, and variables. When applied to a class, it means that the class cannot be extended. When applied to a method, it means that the method cannot be overridden in subclasses. When applied to a variable, it means that the variable's value cannot be changed once initialized. On the other hand, the “finally” keyword is used in exception handling to define a block of code that will always be executed whether an exception is thrown or not. This ensures that resources are properly closed and released, making it useful for cleanup operations.
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1 - The ‘final’ keyword in Java is used to declare a variable as a constant, meaning its value cannot be changed once assigned. On the other hand, the ‘finally’ keyword is used in exception handling to define a block of code that will always be executed after a try catch block, regardless of whether an exception was thrown or not.
2) When a variable is declared with the ‘final’ keyword, its value cannot be modified throughout the program's execution. This is useful when you want a variable to be constant and prevent accidental reassignment.
3) The ‘final’ keyword can be applied to variables, methods, and classes, ensuring that they cannot be overridden or changed. This can help with code clarity and maintainability.
4) In contrast, the ‘finally’ block is used in exception handling to define a piece of code that will always be executed, even if an exception is thrown and caught in the try or catch block.
5) The ‘finally’ block is typically used to perform cleanup tasks such as closing resources (e.g., files, database connections) that were opened in the try block, ensuring that they are properly handled and released.
6) It is important to note that the ‘finally’ block will execute even if there is a return statement in the try or catch block, making it a useful tool for guaranteeing certain actions are taken in any circumstance.
7) In summary, the ‘final’ keyword is used for declaring constants, while the ‘finally’ keyword is used for ensuring a block of code is always executed, making them two distinct features in Java programming.
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