What Java training programs or courses have you studied during your preparation?

During my Java preparation, I studied several courses and curricula that covered basic and advanced topics. These included:

• Java fundamentals: syntax, data types, flow control.
• Object-oriented programming: classes, inheritance, polymorphism.
• Working with collections and generics.
• Exceptions and error handling.
• Introduction to multithreading and synchronization.
• Working with files and input/output.
• Basics of working with databases via JDBC.
• Introduction to Java Stream API and lambda expressions.

I also studied practical courses with tasks and projects that helped reinforce my knowledge in practice.