What initial actions should be taken when familiarizing with an already developed project?

When familiarizing yourself with an already developed Java project, it is recommended to:

• Study the documentation: README, architectural descriptions, code comments.
• Understand the project structure: what modules, packages, dependencies are used.
• Set up the environment: build the project, run tests.
• Learn the entry points: main classes, controllers, services.
• Understand the business logic: what tasks the project solves, how the key components are organized.
• Use a debugger: go through the main execution scenarios.
• Pay attention to the technologies and libraries used.

This approach will help you quickly get into the context and understand how the project works from the inside.