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.

University of California San Diego
Skills you'll gain: Data Structures, Graph Theory, Algorithms, Bioinformatics, Data Storage, Development Testing, Theoretical Computer Science, Computational Thinking, Network Analysis, Computer Programming, Programming Principles, Python Programming, C and C++, Infectious Diseases, Java Programming, Java, Rust (Programming Language), Javascript, Software Testing, Debugging
Intermediate · Specialization · 3 - 6 Months

Coursera
Skills you'll gain: Unit Testing, JUnit, Test Case, Software Testing, Software Development, Software Engineering, Java Programming, Java
Beginner · Guided Project · Less Than 2 Hours

Codio
Skills you'll gain: Algorithms, Data Structures, Java, Java Programming, Other Programming Languages
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Eclipse (Software), Java, Integrated Development Environments, Java Programming, Code Reusability, Functional Design
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Selenium (Software), Java, Java Programming, File I/O, File Management, Cascading Style Sheets (CSS), Extensible Markup Language (XML), Test Automation, Extensible Languages and XML, Test Script Development, Web Scraping, Apache, Web Development Tools, Data Import/Export, Verification And Validation, HTML and CSS, Hypertext Markup Language (HTML)
Intermediate · Course · 1 - 3 Months

University of California San Diego
Skills you'll gain: Data Structures, Algorithms, Data Storage, Graph Theory, Computer Programming, C++ (Programming Language), Java Programming, Java
Intermediate · Course · 1 - 3 Months

Duke University
Skills you'll gain: UI Components, User Interface (UI), Computational Thinking, HTML and CSS, Web Design and Development, Interactive Design, Hypertext Markup Language (HTML), Web Development, Programming Principles, Web Design, Javascript, Event-Driven Programming, Computer Programming, Algorithms, Image Analysis, Web Applications, Cascading Style Sheets (CSS)
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Apache Maven, Java Programming, Java, Build Tools, Database Design, Database Development, Database Application, Eclipse (Software), Full-Stack Web Development, CI/CD, Web Applications, Code Reusability, Continuous Integration, Model View Controller, Web Development, Authentications, Authorization (Computing), Application Development, UI Components, Automation
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: HTML and CSS, Bootstrap (Front-End Framework), Responsive Web Design, Front-End Web Development, User Interface (UI), Hypertext Markup Language (HTML), Web Frameworks, Web Development, Web Development Tools, Cascading Style Sheets (CSS), Web Design, React.js, General Networking, Javascript, Web Servers
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Design, Computer Programming, Code Reusability, Memory Management
Intermediate · Course · 1 - 4 Weeks

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Software Design Patterns, Object Oriented Programming (OOP), Software Design, Object Oriented Design, Java, Java Programming, Program Development, Computer Programming, Graphical Tools, User Interface (UI), Simulations
Intermediate · Course · 1 - 3 Months

Skills you'll gain: SQL, Database Management, Database Development, Databases, Relational Databases, Database Application, Database Design, Query Languages, Data Access, Java, Java Programming, UI Components, User Interface (UI), Transaction Processing, Event-Driven Programming, Software Development
Beginner · Course · 1 - 4 Weeks