Collections sort not being accepted by Eclipse

Question

    import java.io.BufferedReader;
    import java.util.Collections;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileReader         


        

Answer 1

The collection myCelebrityList is of type CelebrityNamesFile and that means it can only accept instances of that class. You need to create an instance of CelebrityNamesFile and add it to the collection. The Collections wont accept your collection because you class CelebrityNamesFile does not implement the Comparator interface. You need to pass your comparator instance to the Collections.sort() as second parameter.