Throw And Throws Difference In Java
Understanding the Difference Between 'throw' and 'throws' in Java
Throw And Throws Difference In Java
In Java, “throw” is a keyword used to throw an exception explicitly within a method or a block of code, indicating that an abnormal condition has occurred. On the other hand, “throws” is used in a method declaration to specify the exceptions that the method might throw during its execution. When a method is declared with “throws,” it means that the method does not handle the exception itself, but it propagates the exception to the calling method or block. In summary, “throw” is used to manually throw an exception, while “throws” is used to declare the exceptions that a method might throw.
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1 - The main difference between “throw” and “throws” in Java is their usage in exception handling.
2) The “throw” keyword is used to explicitly throw an exception within a method or block of code. It is used when a specific exception needs to be raised based on certain conditions.
3) On the other hand, the “throws” keyword is used in the method signature to declare the type of exception that a method might throw during its execution. It is used to indicate the potential exceptions that need to be handled by the caller of the method.
4) When using “throw”, the method directly throws an exception, interrupting the normal flow of execution and transferring control to the exception handling mechanism.
5) When declaring with “throws”, the method specifies the exceptions it can potentially throw, but it does not actually throw them within the method. The responsibility to handle these exceptions lies with the caller or higher level methods.
6) The “throw” keyword is used at the point where the exception is raised, while the “throws” keyword is used in the method signature to indicate potential exceptions that can be thrown.
7) It is mandatory to either catch or declare the checked exceptions using the “throws” clause in the method signature, whereas the use of “throw” is optional and depends on the programmer's logic for raising an exception.
8) Using “throw” allows for more control over when and how exceptions are raised in the code, whereas “throws” is more of a preventive measure to inform callers about potential exceptions that may occur.
9) Both “throw” and “throws” are essential components of Java exception handling mechanisms, with “throw” being used for raising specific exceptions and “throws” for declaring potential exceptions that a method may throw.
10) To effectively understand and utilize exception handling in Java, it is crucial to grasp the distinctions between “throw” and “throws” and their respective roles in managing exceptions within the code.
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