Errata for OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide - page 224

[T Vergilio]

Last paragraph, where it says:

Retrieval frequently uses ifPresent() and get().

should be:

Retrieval frequently uses isPresent() and get().

[Jeanne Boyarsky]

Confirmed and logged. There is an ifPresent method (in the next sentence), but it takes a functional interface and isn't what we meant in that sentence. Good catch!

[T Vergilio]

Also on the first paragraph of the page,

You can check if it contains a value with ifPresent() and get() the value inside.

should be:

You can check if it contains a value with isPresent() and get() the value inside.

[Jeanne Boyarsky]

Agreed. That one doesn't catch me surprise at least. (I often create the exam essentials by taking pieces of the summary and rewording them)