final keyword is used in different contexts. First of all, final is a non-access modifier applicable only to a variable, a method, or a class. The following are different contexts where final is used.
Final Variable: When applied to a variable, the final keyword indicates that the variable’s value cannot be changed after it has been initialized. This is typically used for constants or values that should not be modified.
Final Method: When applied to a method, the final keyword indicates that the method cannot be overridden by subclasses. This is often used to enforce a specific behavior in a class’s methods.
Final Class: When applied to a class, the final keyword indicates that the class cannot be subclassed. In other words, you cannot create a subclass that extends a final class.
Using the final keyword can provide benefits such as security, performance optimization, and maintaining code consistency. However, it should be used judiciously, as it restricts the flexibility of modification and extension.
Reference: www.geeksforgeeks.org
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