Throw custom Exceptions in Java/Android

Question

I'm developing a custom Exception class, in which I have the following constructors:

public class UserException extends Exception
{
    string message;
    public UserException() {
        super();
    }

    public UserException(String message, Throwable cause)
    {
        super(message, cause);

        this.cause = cause;
        this.message = message;
    }
}

And I create a new custom exception like this:

private Camera.PreviewCallback SetPreviewCallBack() throws UserException {
    .......
    // Something went wrong
    throw new UserException("Something failed.", new Throwable(String.valueOf(UserExceptionType.CaptureFailed)));
 }

But when I insert my throw new UserException(...) it tells me to surround it with try/catch!! That's not the idea, isn't it? I want to throw custom exceptions when I need them to be thrown, without surronding my new Exceptions with more try/catch clauses.

So, what I'm doing wrong? What I'm misunderstanding?

Answer 1

In addition to Eran's answer, you could also make your custom Exception extend RuntimeException, which does not need to be caught.