How does the throw keyword differ from throws?

• A. Throw creates an exception, throws declares it
• B. Throw is for checked exceptions, throws is for unchecked
• C. Throw can be used inside try blocks, throws cannot
• D. Throw works with static methods, throws does not

Answer: (A)

The distinction between "throw" and "throws" is essential for understanding exception handling in Java. The "throw" keyword is used to actually throw an exception instance, meaning it instigates the occurrence of an exception, and thus it is followed by an instance of an Exception class or its subclass. This is often done within a method to signify that something has gone wrong, and it can facilitate flow control in applications by allowing specific responses to various error conditions.

On the other hand, the "throws" keyword is used in a method declaration to specify that a method might throw one or more exceptions. By declaring this in the method signature, it informs the caller of the method that they need to handle those exceptions, which can be either checked or unchecked exceptions. This mechanistically separates the concern of handling exceptions at a different level than where they may potentially be triggered.

Therefore, the distinction is clear: "throw" actively creates and throws an instance of an exception, while "throws" merely indicates that a method could throw exceptions during its execution, requiring the calling method to manage them appropriately. This is why the first answer option is correct, as it accurately describes the functional difference between the two keywords.