Layered Architecture

Each layer of the layered architecture pattern has a specific role and responsibility within the application.[1]

Open-Closed Principle

• Definition
  • Software entities should be open for extension, but closed for modification
• What does it mean?
• How to achieve that?

N-tier architecture

Separation of concerns

Layers of isolation

Architecture sinkhole anti-pattern

Error Handling

• What is and Why we need error handling?
• Best practices
• Checked vs Unchecked exceptions
• Demo

Work with files

• Existing API
• Resource leaks
• try-with-resources

Comments in Java

• Documentation vs Implementation
• Best practices
• Demo