Question

When creating an exception class is it okay to only provide a “specific” constructor:

public CircularLinkException(final String msg, final String link)
{
    super(msg);
    link = inputName;
}

or should I implement the constructors of Exception:

public class CircularLinkException extends Exception
{
    public CircularLinkException() { /* ... */ }
    public CircularLinkException(final String msg) { /* ... */ }
    public CircularLinkException(final Throwable t) { /* ... */ }
    public CircularLinkException(final String msg, final Throwable t) { /* ... */ }
}

Answer 1

You should create all the Constructors you will use.

Don’t add code when you imagine a use for something. Add it when you have a requirement for it.

http://c2.com/xp/YouArentGonnaNeedIt.html