Collection classifier

import java.util.*;

public class CollectionClassifier2 {
public static String classify(Collection c) {
return (c instanceof Set ? "Set" :
(c instanceof List ? "List" : "Unknown Collection"));
}

public static void main(String[] args) {
Collection[] tests = new Collection[] {
new HashSet(), // A Set
new ArrayList(), // A List
new HashMap().values() // Neither Set nor List
};

for (int i = 0; i < tests.length; i++)
System.out.println(classify(tests[i]));
}
}