Which method is NOT available for a final attribute?

• A. Getter method
• B. Setter method
• C. Constructor method
• D. Static method

Answer: (B)

A final attribute in a class is one that has been declared to be constant, meaning its value cannot be changed once it has been assigned. This inherent characteristic of final attributes directly influences the methods that can be associated with them.

The setter method is designed to modify the value of an attribute. Since a final attribute cannot have its value changed after initialization, it is not possible to implement a setter method for it. This restriction ensures that the integrity of the final attribute is maintained throughout the lifecycle of the object.

In contrast, getter methods provide access to the value of the attribute, allowing external code to read its state without modifying it. A constructor method can be used to initialize final attributes when an instance of the class is created, thus complying with the final attribute's need to be assigned a value only once. Static methods can also interact with final attributes but do not modify them directly; they typically perform operations that might involve the final attribute without altering its state.

Thus, the inability to change the value of a final attribute is the reason why a setter method is not applicable, distinguishing it from the other methods related to final attributes.