Difference Between Throw And Throws In Java
distinguishing 'throw' and 'throws' in Java
Difference Between Throw And Throws In Java
In Java, “throw” is a keyword used to explicitly throw an exception within a method. It is used to indicate that a specific exception has occurred and needs to be handled by either the calling method or by higher-level methods in the call stack. On the other hand, “throws” is a keyword used in the method signature to declare the type of exceptions that a method may throw but does not handle itself. This helps in informing the calling method about the exceptions that it needs to handle or propagate further. The main difference is that “throw” is used to actually throw an exception, while “throws” is used to declare the exceptions that a method may throw.
To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free
Message us for more information: +91 9987184296
1 - Throw:
In Java, “throw” is a keyword used to explicitly throw an exception within a method.
The “throw” keyword is followed by an instance of an exception class that is thrown.
When an exception is thrown using “throw”, the method where it occurs must be declared to throw that exception or must handle it using try catch block.
2) Throws:
“Throws” is used in a method signature to declare that the method can potentially throw certain exceptions.
When a method is declared with “throws”, it indicates that the method may throw one or more exceptions of the specified types.
The exceptions listed in the “throws” clause must be either handled by the calling method using a try catch block or propagated up the call stack.
3) Handling:
Using “throw”, developers can explicitly throw an exception at a specific location in the code where an exceptional condition occurs.
“Throws” clause is used in method declaration to inform the caller about the potential exceptions that the method might throw for the caller to handle them appropriately.
While “throw” is used within the method to throw an exception directly, “throws” is used in the method signature to declare the types of exceptions that may be thrown by the method.
4) Syntactical Difference:
The keyword “throw” is followed by an instance of an exception that is thrown, whereas “throws” is followed by the exception types that the method may throw.
“throw” is used inside the method body, whereas “throws” is used in the method signature.
5) Error Handling:
Using “throw”, developers can handle exceptional situations by throwing exceptions, which can then be caught higher up the call stack by appropriate exception handling mechanisms.
By declaring exceptions in the “throws” clause, the method is explicitly stating that it could encounter certain exceptional conditions, allowing developers to design their error handling strategy accordingly.
This distinction between “throw” and “throws” is important for developers to handle exceptions effectively and maintain the robustness of their Java programs.
Browse our course links : https://www.justacademy.co/all-courses
To Join our FREE DEMO Session: Click Here
Contact Us for more info:
- Message us on Whatsapp: +91 9987184296
- Email id: info@justacademy.co
Python Data Analysis Interview Questions
