Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
hamsternation
26,616 PointsWhy did the code still raise an exception if requireNonNull was supposed to "catch" the null case?
Maybe I'm not understanding this but why did the code still raise an exception? I thought the requireNonNull catches the NullPointerException and calls the CreateIssue function instead of the code actually executing and raising an exception?
1 Answer
hamsternation
26,616 PointsAh nevermind, answered my own question. basically requireNonNull is still programmed to raise an exception. It's one of the functional programming methods that does the checking if something returns Null for you instead of coding it yourself.
Basically it replaces this:
If (input == null) {
do.something();
throw new IllegalArgumentException("Null input!");
} else {
code.Execute();
}
Mark Sebeck
Treehouse Moderator 38,004 PointsMark Sebeck
Treehouse Moderator 38,004 PointsI changed your comment to an answer and made it the Best Answer.