These videos are excellent and explain many different concepts in Java.
A great way to practice for the AP exam!
Review Java concepts.
Another great way to review concepts.
An APCS A question leader, he has a great 45 minute AP review video!
This presents a thorough review of the concepts in the APCS Principles course!
More resources to study APCSP!
A link to the curriculum Xavier uses for APCSP.