Sybex 816 Java OCP 11 Programmer II Study Guide Set.of Errata

[Charles O'Leary]

Like List, you can create an immutable Set in one line or make a copy of an existing one.

Set letters = Set.of('z', 'o', 'o') 

VitalSource page 123 produces:
Exception in thread "main" java.lang.IllegalArgumentException: duplicate element: o

[Campbell Ritchie]

Yes, that behaviour is specified in the API documentation. I presume you have checked to confirm that is a new erratum.

[Jeanne Boyarsky]

Added to errata. I can't believe that snuck into the book!

I even wrote a blog post last year when I discovered that behavior.

[Charles O'Leary]

Jeanne BoyarskyI even [url=https://www.selikoff.net/2019/05/26/did-you-know-set-of-does-that/ wrote:wrote a blog post last year[/url] when I discovered that behavior.

Nice write up.  Thanks!