Java courses can help you learn object-oriented programming, data structures, exception handling, and multithreading concepts. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Scrimba
Skills you'll gain: Web Applications, Web Design and Development, Debugging, HTML and CSS, Web Development, Mobile Development, Database Application, Web Development Tools, Responsive Web Design, Real Time Data, Frontend Performance, User Interface (UI), Secure Coding, Javascript, Data Access, Data Management, Application Deployment
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Web Development Tools, Data Structures, Javascript, Data Access, Programming Principles
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: COBOL (Programming Language), Prompt Patterns, Prompt Engineering, Code Review, Code Reusability, Application Lifecycle Management, CI/CD, Agentic systems, Software Technical Review
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Responsive Web Design, HTML and CSS, Web Design, Application Deployment, Cascading Style Sheets (CSS), Development Environment, Webpack, Animations, Javascript, Web Development Tools, Hypertext Markup Language (HTML), UI Components, Typography
Beginner · Course · 1 - 3 Months

Whizlabs
Skills you'll gain: Amazon Web Services, Containerization, Kubernetes, Application Deployment, Cloud-Native Computing, Cloud Deployment, Devops Tools, Cloud Security, Hybrid Cloud Computing, Scalability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Structures, Algorithms, Computer Programming, Computational Thinking, Debugging, Problem Solving, C++ (Programming Language), Performance Tuning, Theoretical Computer Science, Solution Design, Python Programming, Computational Logic
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Prompt Engineering, Responsive Web Design, OpenAI API, HTML and CSS, Cascading Style Sheets (CSS), Javascript, LLM Application, Application Development, User Interface (UI) Design, Web Design and Development, Application Programming Interface (API), OpenAI, Figma (Design Software)
Intermediate · Guided Project · Less Than 2 Hours

★ 4.6 (22) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Cucumber (Software), Behavior-Driven Development, Selenium (Software), Gherkin (Scripting Language), Test Automation, Test Script Development, JUnit, Software Testing, Apache Maven, Test Data, Test Tools, Test Case, Scenario Testing, Maintainability
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Software Design Patterns, Computational Thinking, Software Design, Algorithms, Program Development, Theoretical Computer Science, Software Development, Computer Programming, Problem Solving, Software Engineering, Data Structures, Computer Science, Javascript, Programming Principles, Web Development, Graph Theory, Machine Learning Methods, Data Science, Solution Design
Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: Software Design, IntelliJ IDEA, Object Oriented Programming (OOP), Object Oriented Design, Program Development, Java, Java Programming, Integrated Development Environments, Development Environment, Data Structures, Command-Line Interface
★ 4.7 (22) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: JavaScript Frameworks, Event-Driven Programming, Javascript, Frontend Performance, Frontend Integration, Object Oriented Programming (OOP), Video Game Development, Web Development, Scripting, Development Environment, Cascading Style Sheets (CSS), Front-End Web Development, Data Validation, Real Time Data, Prototyping, Data Integrity, Programming Principles, Computational Logic, Data Storage, Code Reusability
Beginner · Specialization · 3 - 6 Months