Error in Sun Certified Programmer for Java 6 Study Guide

[Michael Iaria]

In the Self-Test questions, the following code is listed for Chapter 7, question 16:

public class GeoCache {
    public static void main(String[] args) {
        String[] s = {"map", "pen", "marble", "key"};
        Othello o = new Othello();
        Arrays.sort(s, o);
        
        for(String s2 : s) {
            System.out.print(s2 + " ");
        }
        
        System.out.println(Arrays.binarySearch(s, "map"));
    }
}
 
static class Othello implements Comparator<String> {
    public int compare(String a, String b) {
        return b.compareTo(a);
    }
}

This code doesn't compile (static modifier on class Othello), which is one of the choices (A). The answers are listed as D and G, claiming that there is actually output. Has anyone else encountered this?

[Quirino Gervacio]

Hi Michael,

I checked the code and it compiles. The difference is that the code in the book, the class Othello is a member of GeoCache. But the code you posted, Othello is not a member of GeoCache.

I hope this helps.

[Michael Iaria]

Oh!! Thanks!