Throw And Throws In Java Difference
Difference between 'throw' and 'throws' in Java
Throw And Throws In Java Difference
In Java, “throw” is a keyword used to explicitly throw an exception within a method or block of code. It is used when a specific condition occurs that requires an exception to be thrown. On the other hand, “throws” is used in method signatures to declare the types of exceptions that a method might throw during its execution. When a method declares a checked exception using the “throws” keyword, the caller of that method needs to handle or declare that exception to prevent a compilation error. So, while “throw” is used to actually throw an exception, “throws” is used to declare the exception that a method may throw.
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1 - In Java, the keyword “throw” is used to explicitly throw an exception within a method. It is followed by an instance of an exception class that is thrown. On the other hand, the keyword “throws” is used in the method signature to indicate that the method could potentially throw exceptions of a specific type.
2) When using “throw”, the exception is thrown at a specific point within the method code, allowing the programmer to handle specific error conditions. On the contrary, “throws” is used in the method signature to declare the potential exceptions that the method might throw, allowing the caller to be aware of the possible exceptions that need to be handled.
3) “throw” is used to raise a specific exception manually during the execution of a method, typically when certain conditions are met. In contrast, “throws” is used to declare the exceptions that a method might throw but are not necessarily thrown by the method itself.
4) The “throw” keyword is used for exception handling by explicitly throwing an exception in the method body, while the “throws” keyword is used for exception declaration in the method signature.
5) The “throw” keyword is used to throw a single exception at a time in a method, while the “throws” keyword can be used to declare multiple types of exceptions that a method might throw.
If you want your students to understand the nuances of exception handling in Java with “throw” and “throws”, it would be beneficial to demonstrate examples showcasing how to use these keywords effectively in different scenarios. Providing hands on coding exercises and real world examples can enhance their understanding of exception handling in Java.
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