How to watch for NullPointerEx in Eclipse using Debbuger Add Watch Expression feature?

问题

Hi how can I use that Add Watch Expression of eclipse to watch for any NullPointerExceptions that my application can throw ?

I saw a Guy once adding some code into that feature and with that he made eclipse debugger to stop when any NullpointerEx was "born".

I would like to learn how to do that.

回答1:

You don't use 'watch expression'. Go to the "breakpoints" view and add an exception breakpoint for NullPointerException.

回答2:

I don't know how to do this using Add Watch Expression, but you can set breakpoints on certain types of exceptions being thrown. Perhaps this is what you're looking for?

来源：https://stackoverflow.com/questions/4809646/how-to-watch-for-nullpointerex-in-eclipse-using-debbuger-add-watch-expression-fe