Example of Throw Clause In Java | What Are The Practical Uses Of Throw And Throws Java | H2K Infosys
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Date: 17/07/2017

Example of Throw Clause In Java | What Are The Practical Uses Of Throw And Throws  Java | h2kinfosys

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In Java, the throw and throws keywords are essential for handling exceptions effectively. The throw keyword is used to explicitly throw an exception from within a method or code block, allowing you to create custom exceptions and manage error scenarios precisely. This is particularly useful when you encounter exceptional conditions that don't match the predefined exceptions provided by Java's standard libraries. For instance, you might use throw to signal an error when validating user input or when encountering unexpected data during data processing. By throwing custom exceptions, you provide meaningful context to the caller about the nature of the issue, aiding in debugging and error resolution.

On the other hand, the throws keyword is used in method declarations to indicate that a method might throw certain types of exceptions. This is useful for conveying information to callers about the exceptions they should handle or propagate when calling the method. When a method is declared with throws, it essentially documents the possible exception scenarios that callers need to handle. This aids in code robustness and helps developers write code that handles potential errors gracefully. For example, when dealing with file I/O operations, the FileNotFoundException can be declared using throws in the method signature, indicating that callers should handle or propagate this exception when calling the method that performs file operations.

In both cases, throw and throws contribute to creating more maintainable, predictable, and robust code by enabling explicit error signaling and proper exception handling throughout the program's execution flow.

TRY….CATCH block OR by using the THROW CLAUE
Throw clause Examples
--Handling THROW clause with Try …catch block
--handling THROW Clause with THROWS clause 

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