Question

Here I am, thinking I know Java, and I get the error Variable 'storage' might not have been initialized. Here is my code:

public class RobbleSet {
    private final Set<Robble> storage; // Error occurs here

    public RobbleSet() {
        storage = new HashSet<Robble>();
    }

    public addRobble(Robble r) {
        storage.add(r); // Error occurs here too
    }
}

storage is initialized in the constructor. What gives?

Answer 1

One problem is that you’re not declaring a return type for addRobble; you need to change this:

    public addRobble(Robble r) {

to this:

    public void addRobble(Robble r) {

I suspect that this is the problem — that your compiler thinks that addRobble is a misnamed constructor, so is complaining that it fails to initialize storage — but even if it turns out that it’s not the problem, it’s definitely a problem.