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Is it possible to use "throws" according to the method in an external JAR

I have a separate JAR library with a set of methods that throw custom exceptions, for example:

public String methodName() throws CustomException {
    // code here
}

Then I add the JAR to the classpath and reference the library method in the try statement in the source code:

try {
    DemoClass demoClass = new DemoClass ();
    demoClass.methodName() // this should throw a CustomException if something occurs
} catch (CustomException e) {
    // something here
}

The following compilation error is saved in the above code snippet:

A custom exception never throws itself into the body of the corresponding try statement

If the method is in a local context (not packaged in a JAR), the code works. So my question is: is it possible to "throw out" user exceptions from JAR libraries?

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3 answers

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+1

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    MyClass myClass = new MyClass();
    myClass.methodName() // this should throw a CustomException if something occurs
} catch (CustomException e) {
    // something here
}

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+2

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However, I suspect that you actually have two different (incompatible) versions of the corresponding class or interface in the two JARs. That would be a mistake. Even if you manage to assemble it, you are likely to run into problems with class loaders due to a signature conflict.

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