Java OCP 8 Programmer II Study Guide Error in Chapter 2 Question 12

[Dmitry Gorshenin]

Hi! I've found an error in Java OCP 8 Programmer II Study Guide Chapter 2 Question 12, and I couldn't find any info about this error on the forum or errata list. I'm sorry in advance, if I didn't search well.

There are two public types in question code:

public interface Climb {
    boolean isTooHigh(int height, int limit);
}
public class Climber {
    public static void main(String[] args) {
        check((h, l) -> h.toString(), 5); // x1
    }
    private static void check(Climb climb, int height) {
        if (climb.isTooHigh(height, 10)) // x2
            System.out.println("too high");
            else System.out.println("ok");
} }

But the given correct answer (C. Compiler error on line x1.) would be really correct only if some of the types weren't public. I chose the answer D. Compiler error on a different line.

Best regards and thanks a lot again for the great book.

[Dmitry Gorshenin]

Excuse me please. Maybe I slept badly this night (( This seems to be is the common agreement through the questions, but I saw this only when solving q.12 ((

[Jeanne Boyarsky]

Dmitry,
Notice there are no line numbers in that example in the book. This means you are free to imagine them in different files.

[Dmitry Gorshenin]

Jeanne, thanks a lot for your answer and support!

[Micheal Bush]

Hi, I don't see line x2 has any problem but line x1 should returns boolean. Can somebody explain the reason of choosing x2. Thank you!

[Jeanne Boyarsky]

Micheal Bush wrote:Hi, I don't see line x2 has any problem but line x1 should returns boolean. Can somebody explain the reason of choosing x2. Thank you!

Check the end of chapter explanation. x2 isn't the answer which is why you can't find anything wrong with it!

[Micheal Bush]

Jeanne Boyarsky wrote:

Micheal Bush wrote:Hi, I don't see line x2 has any problem but line x1 should returns boolean. Can somebody explain the reason of choosing x2. Thank you!

Check the end of chapter explanation. x2 isn't the answer which is why you can't find anything wrong with it!

My bad, Thank you, Jeanne!