Need to a Java class to identify different items on a page (compared to another page)

General information for the business: A local shopping search engine
Kind of development: New program from scratch
Num. of modules: 1
Description of requirements/functionality: Hi,

We are looking for someone who can write a Java class that will, compare the content of two webpages and determine the differences between them.

The inputs will be two URLs.

The output should be a List where each element of the list is a unique piece of content on the webpage (happy to explain via private message if you are unsure).

You can suggest any diff algorithm, but based on my research the standard one will be Eugene W. Myers's algorithm which is described here (https://blog.jcoglan.com/2017/02/12/the-myers-diff-algorithm-part-1/).

The deliverable will be a Java class that does the processing, details of any libraries you used and a test class to run the java class. I will then integrate this class + libraries with the rest of my project.
Specific technologies required: java
Extra notes: