Hello everyone.
I was studying the flashcards of the Sybex online tool, and I came across a flashcard that has a wrong answer (as you can see in the image). But taking a look at the
Errata list, there is the following explanation:
"A flashcard asking which classes are final is incorrect. StringBuilder and StringBuffer are not final. (You don’t need to know this; you only need to know
String is final)".
But the StringBuilder and StringBuffer are final, so I believe there is a typo in this explanation.