1Z0-829 OCP Java 17 book error

[Mike Gualeni]

In Table 9.6, on page 485 "Using the Map interface" the word Bi is missing:

public V merge(K key, V value, Function(<V, V, V> func))

should be:

public V merge(K key, V value, BiFunction(<V, V, V> func))

[Jeanne Boyarsky]

Agreed and added to the errata. Thanks!

[Giuseppe Di Fatta]

On Review Questions chapter 4, question 10.
The last line of code should not compile, the values are not doubles

26: var doubles = new double[] {one, two, three};

So the rigth answer is B. (1 compile error )and not A

[Campbell Ritchie]

Welcome to the Ranch

Have you tried the code? The values in the following code undergo automatic widening conversion:-

jshell> int one = 1, two = 2, three = 3; var doubles = new double[] {one, two, three};
one ==> 1
two ==> 2
three ==> 3
doubles ==> double[3] { 1.0, 2.0, 3.0 }

I shouldn't have declared multiple values on the same line.