What can the final keyword modify in java?

The final keyword in Java can be used to modify variables, methods and classes to make them unchangeable. After modifying a variable, the variable cannot be reassigned after declaration and becomes a constant; after modifying a method, the method cannot be overridden by a subclass; after modifying a class, the class cannot be inherited.

What the final keyword can modify in Java

The final keyword is used to modify variables, Methods and classes to specify that they cannot be changed. The details are as follows:

1. Variable

• After modifying a variable, the variable cannot be reassigned after declaration and is called a constant.
• Constant must be initialized when declared.

2. Method

• After modifying the method, the method cannot be overridden by subclasses.
• Subclasses can inherit final methods, but cannot change their implementation.

3. Class

• After modifying a class, the class cannot be inherited.
• Final classes are typically used to implement immutable objects or provide unmodifiable APIs.

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