Is it possible to render a nested collection on the Web?

Question

Java

Good afternoon, dear Java gurus. Tell me if there is a simple option how to display for the selected element of the collection - a subcollection nested in it. Let's say the first collection contains the names of product categories. When you select a specific category, the products that are in this category are displayed, that is, the elements of the subcollection.
Model as shown in the picture.

Answer 1

This is the question, this is the answer: there is a possibility, there is a simple option.
Remember, telepaths are always on vacation. If you want a detailed answer, ask a more detailed question!

Answer 2

And here WEB?