Сейчас ищут
Geekific. Смотреть видео: SOLID Design Principles With Java Examples Clean Code And Best Practices Geekific, The Prototype Pattern Explained And Implemented In Java Creational Design Patterns Geekific, The Composite Pattern Explained And Implemented In Java Structural Design Patterns Geekific, Big O Notation Explained Time Space Complexity In Programming Geekific.