Java
Primary language for enterprise backend development
What problem does this technology solve?
Java is a cross-platform, object-oriented programming language. With its stable runtime and mature ecosystem, it has long powered server-side systems in finance, e-commerce, and enterprise IT. Learning Java typically starts with syntax and object-oriented fundamentals, then progresses to collections, concurrency, and JVM tuning.
If you're unsure whether to invest time in this, check your target job descriptions first. See how frequently the technology appears and what role it plays in projects, then decide on your learning priority.
Core Knowledge Points
- Basic Syntax, Object-Oriented Programming, and Exception Handling
- Boundaries of Collection Framework and Generics Usage
- Multi-threading and Concurrency Utilities
- JVM Memory Structure and Garbage Collection Basics
- Maven / Gradle Dependency and Project Management
Complementary Learning Path
Learn Java systematically along the roadmap
The learning path is divided into stages, each with clear objectives and key concepts.
Getting Started: Syntax and Programming Mindset
Able to read and write well-structured Java programs.
Basics: Core Language Skills
Familiar with common libraries; write maintainable code.
Advanced: Web & Engineering
Understand HTTP and layered architecture; independently develop APIs.
Hands-on: Full Project Implementation
Produce deployable and maintainable backend services
Complementary Content
Java Tutorials, Examples, and Case Studies
Starting with a specific problem is easier to stick with than reading through the entire documentation.