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: Responsive Web Design, JSON, User Interface (UI) Design, Color Theory, Cascading Style Sheets (CSS), User Interface (UI), HTML and CSS, Hypertext Markup Language (HTML), Restful API, Web Content Accessibility Guidelines, Event-Driven Programming, Web Design, Typography, API Design, Web Applications, User Interface and User Experience (UI/UX) Design, Application Programming Interface (API), React.js, Javascript, Web Development
★ 4.7 (601) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Frontend Integration, Full-Stack Web Development, Email Automation, Front-End Web Development, HTML and CSS, User Interface (UI), Web Design, Code Reusability, Server Side, Java Programming, Email Marketing, MySQL, Program Development, Hypertext Markup Language (HTML), Software Architecture, Web Applications, Back-End Web Development, Development Testing, Cascading Style Sheets (CSS), Case Studies
★ 4.4 (22) · Intermediate · Course · 1 - 4 Weeks

Universidad de Palermo
Skills you'll gain: Object Oriented Design, Object Oriented Programming (OOP), Java, Java Programming, Computer Programming, Programming Principles, Code Reusability
★ 4.6 (7) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Responsive Web Design, Front-End Web Development, Git (Version Control System), Web Content Accessibility Guidelines, User Interface and User Experience (UI/UX) Design, HTML and CSS, Cascading Style Sheets (CSS), UI/UX Strategy, React.js, Code Review, Version Control, Usability, User Interface (UI), Usability Testing, User Interface (UI) Design, Software Technical Review, Web Applications, Hypertext Markup Language (HTML), Semantic Web, Javascript
★ 4.6 (467) · Intermediate · Course · 1 - 4 Weeks
University of Illinois Urbana-Champaign
Skills you'll gain: Computational Logic, Application Specific Integrated Circuits, Theoretical Computer Science, Data Structures, Verification And Validation, Algorithms, Programming Principles, Design Software, Network Model, Model Optimization, Digital Design
★ 4.6 (557) · Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Relational Databases, SQL, Databases, Data Access, Data Manipulation, Database Development, Query Languages
Beginner · Course · 1 - 4 Weeks

University of Alberta
Skills you'll gain: Service Oriented Architecture, API Design, Web Services, Simple Object Access Protocol (SOAP), Microservices, Restful API, Software Architecture, Application Programming Interface (API), Web Applications, Software Design, JSON, Android Development
★ 4.5 (598) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Selenium (Software), JUnit, HTML and CSS, Test Automation, Hypertext Markup Language (HTML), Software Testing, Web Design and Development, Test Script Development, Test Tools, Web Development, Unit Testing, Software Quality Assurance, Java, Data Structures, Java Programming, Cascading Style Sheets (CSS), Test Execution Engine, Code Reusability, Debugging, Software Design Patterns
Intermediate · Course · 1 - 3 Months

University of California, Davis
Skills you'll gain: Threat Modeling, Open Web Application Security Project (OWASP), Secure Coding, Cryptography, Authentications, Exploit development, Encryption, Penetration Testing, Security Strategy, Security Testing, Data Security, Application Security, Exploitation techniques, Software Design, C and C++, Linux Administration, System Design and Implementation, Java, Programming Principles, Cybersecurity
★ 4.5 (617) · Intermediate · Specialization · 3 - 6 Months

Vanderbilt University
Skills you'll gain: Generative AI Agents, Agentic Workflows, AI Orchestration, LLM Application, OpenAI API, Java Programming, Java, AI Workflows, Agentic systems, Generative AI, Prompt Patterns, Prompt Engineering, AI Integrations, Persona (User Experience), Document Management, Secure Coding, Business Logic, Software Design Documents, Plan Execution, Software Design Patterns
★ 4.3 (10) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Java, Java Programming, Object Oriented Design, Computer Programming, Programming Principles, Software Design, Computational Logic, Data Structures
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Spring Framework, JUnit, Application Frameworks, Unit Testing, Java Programming, Enterprise Application Management, Integration Testing, Configuration Management, Development Environment, Extensible Markup Language (XML), Context Management
★ 3.8 (456) · Intermediate · Course · 1 - 4 Weeks