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.

Illinois Tech
Skills you'll gain: Javascript and jQuery, jQuery, Responsive Web Design, Web Development, Version Control, Web Design, Cascading Style Sheets (CSS), Web Design and Development, Hypertext Markup Language (HTML), HTML and CSS, Web Frameworks, GitHub, Web Applications, Javascript, Web Development Tools, Git (Version Control System), Infrastructure Architecture, Network Architecture, Network Infrastructure, Application Frameworks
★ 4.6 (19) · Beginner · Course · 1 - 3 Months

Skills you'll gain: OS Process Management, Scalability, Data Integrity
Intermediate · Course · 1 - 4 Weeks

University of Washington
Skills you'll gain: Responsive Web Design, Web Design, GitHub, HTML and CSS, Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), Version Control, User Experience Design, Usability, User Experience, Javascript, Web Content Accessibility Guidelines, Browser Compatibility, User Story, Web Design and Development, Front-End Web Development, GitHub Copilot, Mobile Development, Semantic Web, Git (Version Control System)
★ 4.7 (34) · Beginner · Specialization · 1 - 3 Months
Skills you'll gain: Web Content Accessibility Guidelines, User Interface (UI), Usability, Web Design, Web Design and Development, Hypertext Markup Language (HTML), Front-End Web Development, UI Components, HTML and CSS, Semantic Web, Cascading Style Sheets (CSS), Javascript
★ 4.7 (36) · Intermediate · Guided Project · Less Than 2 Hours

SkillsBooster Academy
Skills you'll gain: Prompt Engineering, Vibe coding, AI Workflows, Generative AI Agents, Software Development Tools, Application Development, GitHub, Code Review, AI Personalization, Software Development, Generative AI, Artificial Intelligence, Web Development Tools, Web Development, Software Engineering, Responsible AI, Design Software, Front-End Web Development, Javascript, React.js
★ 4.4 (50) · Beginner · Course · 1 - 3 Months
Skills you'll gain: Java, Java Programming, Performance Tuning, Data Structures, Software Engineering, Tree Maps, Scalability, Algorithms, Benchmarking, Theoretical Computer Science
Advanced · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Spring Boot, Database Design, Object-Relational Mapping, Application Frameworks, Spring Framework, Data Modeling, Database Development, Database Software, Data Mapping, Application Development, Database Architecture and Administration, Requirements Analysis, Data Persistence
★ 4.4 (30) · Beginner · Guided Project · Less Than 2 Hours

Scrimba
Skills you'll gain: React.js, Routing Protocols, Code Reusability, JavaScript Frameworks, Frontend Performance, Web Content Accessibility Guidelines, UI Components, Debugging, Javascript, Context Management, Authentications, Data Management
★ 4.8 (35) · Advanced · Course · 1 - 3 Months

Skills you'll gain: Data Validation, Data Integrity, Hypertext Markup Language (HTML), Verification And Validation, Scripting, Javascript, Web Applications
★ 4.7 (19) · Intermediate · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: jQuery, Javascript, Web Applications, Ajax, Front-End Web Development, Hypertext Markup Language (HTML)
★ 4.3 (18) · Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Performance Tuning, Java, Memory Management, Computational Thinking, Algorithms, Java Programming, Data Structures, Scalability, Software Design Patterns, Programming Principles, Enterprise Architecture, Debugging, Management Consulting, Mitigation, Project Implementation
Advanced · Course · 1 - 4 Weeks

Microsoft
Skills you'll gain: Responsive Web Design, Git (Version Control System), Web Development, Cascading Style Sheets (CSS), Data Persistence, React.js, Version Control, Performance Tuning, Full-Stack Web Development, GitHub, Event-Driven Programming, HTML and CSS, Application Design, Development Testing, Video Game Development, Software Design Documents, Game Design, Program Development, Software Testing, Javascript
★ 4.2 (19) · Beginner · Professional Certificate · 3 - 6 Months