Object-oriented programming is a paradigm among others in the field of programming and software development. This paradigm confers good properties to programs, promotes greater conceptual clarity, and primarily offers robustness against future modifications, with very effective software maintenance. Unlike the POOI course, the aim of this course is to primarily present moderately advanced concepts of this paradigm, focusing on the technical aspects often associated with programming languages. We will begin by reviewing the fundamental concepts of object-oriented programming in general. Then, we will address techniques such as multiple inheritance by adopting the concept of interfaces, resolving conflicting situations regarding constant attributes, static attributes, static methods, and default methods, etc. Additionally, we will cover the concept of association relationships and the composition link. We will also address the concept of type conversion, multithreading, expression operators, and Maven applications to manage dependencies between applications. To do this, we assume that the basic concepts of object-oriented programming are more or less understood. The course will be conducted using the Java programming language as a means of illustrating these concepts. Therefore, familiarity with the basics of Java syntax is necessary to put these concepts into practice. The POOII course will allow each student to monitor and guide themselves progressively. Thus, to ensure a good understanding of the course content, practice is necessary. Without practice, there is no good programming, and sometimes no programming at all. I emphasize the importance of individual practice, as learning a language in general, and programming in particular, requires diligent and rigorous work.