Sybex 816 Java OCP 11 Programmer II Study Guide Map.ofEntries Errata

[Charles O'Leary]

Map also provides a method that lets you supply key/value pairs.

 
Map.ofEntries( 
    Map.entry("key1", "value1"), 
    Map.entry("key1", "value1")); 

VitalSource page 129 typo?:
Exception in thread "main" java.lang.IllegalArgumentException: duplicate key: key1

[Campbell Ritchie]

Yes, Map#ofEntries() clearly says it throws that exception if the “K”s in the Entries are duplicated. If you have copied that code exactly then there is a typo in it.

[Charles O'Leary]

Campbell Ritchie wrote:If you have copied that code exactly

Yes.

Campbell Ritchie wrote:then there is a typo in it.

Thanks for the confirmation.

[Campbell Ritchie]

Last night, I wrote:then there is a typo in it.

Or it is intended to show the exception being thrown.

Thanks for the confirmation.

That's a pleasure

[Jeanne Boyarsky]

Definitely a typo. The second line should say "key2" just like in the example above it.

Thanks for reporting. I've added it to the errata list.