(Java) Urgent! How do you use an abstract class?

Question

Urgent! Please help! This project is due soon and I can't continue until I know this! I'm trying to use an abstract class (SongComparator) like so:

SongComparator comparator = new SongComparator();
playlist_1. sort(comparator);

But the first line comes up with this error message: SongComparator is abstract; cannot be instantiated. But if I don't use the first line of code, the variable comparator is never defined. Please help. How do I use these?

Answer 1

An abstract class cannot be directly instantiated. You'll need to create a subclass, and then instantiate that.

class YourSongComparator extends SongComparator {
...
}