Understand the basics of object-oriented programming, including classes, objects, inheritance, and polymorphism.

Familiarize yourself with the basic syntax of Java, including variables, data types, control structures, and functions.

Learn how to use common Java libraries and frameworks, such as the Java Standard Library and Spring Framework.

Practice writing and debugging code, using tools such as the Eclipse or IntelliJ IDEA IDEs.

Understand the importance of code readability and maintainability, and learn best practices for writing clean and efficient code.

Learn about the Java Memory Model and how it affects the performance of your code.

Understand the importance of testing and learn how to use JUnit for unit testing.

Learn how to use version control systems like Git to manage your codebase.

Keep up with the latest updates and developments in the Java ecosystem to stay current with industry trends and best practices.