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When creating a custom exception class (e.g. a custom runtime exception), is there a specific convention for where within the folder/package structure to create it?
Should all the custom exception classes be within the same package?
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It would be a bad practice and will lead to unnecessary inter package dependencies. A custom exception class should always be defined in the same package as the classes which are capable of throwing it. You should try to minimize creating custom exception which are used all over the application, for that use Exception.
To create the exception object, the program uses the throw keyword followed by the instantiation of the exception object. At runtime, the throw clause will terminate execution of the method and pass the exception to the calling method. Save your file as TestDivideByZeroException. java .
The java. lang. Exceptions provides for different exceptions thrown under java lang package.
In order to create a custom exception, we need to extend the Exception class that belongs to java. lang package. Example: We pass the string to the constructor of the superclass- Exception which is obtained using the “getMessage()” function on the object created.
An exception class should always be defined in the same package as the classes which are capable of throwing it. Never create a separate package just to hold exceptions.
In general, a package should encapsulate a single major unit of functionality. Exceptions are part of that functionality.
Subpackages should only be created to limit access to classes and/or methods. This is done by creating "package access" classes and/or methods: they are neither public, nor protected, nor private. Having no access modifier means they are visible only to classes in the same package. If you don't have any such classes or methods, you probably shouldn't be making a subpackage.
Subpackages should not be created for:
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