What is your experience with Java and how long did it take you to master the main aspects of the language?

I have several years of experience working with Java. I mastered the main aspects of the language, such as syntax, object-oriented programming, working with collections and exceptions, in about 2-3 months of intensive study and practice. I further deepened my knowledge by studying multithreading, input-output streams, and modern Java features such as lambda expressions and the Stream API.

For quick mastery, it is helpful to combine reading documentation and books with practical tasks and projects.