This qualifies as IoC. You don’t need no stinkin’ framework.

Application.java

// This class acts as both the injector and the list of components.
//
// It contains a bit of boilerplate so although it’s easy to write it’s not great fun.
//
// It does have the advantage of being very straightforward to understand, and
// everything is static and checked at compile-time.
class Injector {
    public static void main(String[] args) {
        Repository repository = new RepositoryImpl();
        PostBox postBox = new PostBoxImpl();

        // IoC just means that you pass these dependencies into ChapImpl, instead of having
        // ChapImpl construct them. Everything is static and checked by the compiler.
        // There’s no need for any invisible magic.
        Chap chap = new ChapImpl(repository, postbox);
    }
}

interface Repository {
    int getInt();
}

interface PostBox {
    void postInt();
}

interface Chap {
}

class RepositoryImpl implements Repository {
    public int getInt() {
        return 1;
    }
}

class PostBoxImpl implements PostBox {
    private Repository repository;
    private PostBox postBox;

    public PostBox(Repository repository, PostBox postBox) {
        this.repository = repository;
        this.postBox = postBox;
    }

    // ...
}