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.

EDUCBA
Skills you'll gain: Ajax, Web Design, Web Design and Development, Java Platform Enterprise Edition (J2EE), HTML and CSS, jQuery, Cascading Style Sheets (CSS), Web Applications, Responsive Web Design, Scripting Languages, Scripting, Javascript and jQuery, Web Development, Java, Hypertext Markup Language (HTML), Middleware, Model View Controller, Javascript, Hibernate (Java), Application Frameworks
★ 4.3 (12) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Eclipse (Software), Computer Programming, Development Environment, Integrated Development Environments, Programming Principles, Data Structures, Memory Management, Software Installation
Beginner · Course · 1 - 3 Months

Duke University
Skills you'll gain: Software Design, Code Reusability, Program Development, Java, Java Programming, AI Personalization, Object Oriented Programming (OOP), Data Preprocessing, Data Structures, Algorithms, File I/O, Hypertext Markup Language (HTML)
★ 4.7 (658) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Spring Framework, Java Programming, Java, Application Frameworks, Object Oriented Design, Object Oriented Programming (OOP), Software Design Patterns, Extensible Markup Language (XML)
★ 4.7 (13) · Mixed · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Software Design, Functional Design
★ 4.7 (213) · Intermediate · Course · 1 - 3 Months

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

Skills you'll gain: Java, Computer Programming, Data Structures, Code Reusability, Debugging, Functional Design
Intermediate · Course · 1 - 4 Weeks

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

LearnQuest
Skills you'll gain: JUnit, Test Driven Development (TDD), Unit Testing, Software Testing, Test Case, Eclipse (Software), Test Script Development, Test Data, Development Testing, Test Automation, Test Execution Engine, Integrated Development Environments, Testability, Java, Test Tools
★ 3.8 (73) · Intermediate · Specialization · 1 - 3 Months

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

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Programming Principles, Java Programming, Java, Computer Programming, Code Reusability, Data Structures, Object Oriented Programming (OOP), Computational Logic, Program Development, Problem Solving, Algorithms, Eclipse (Software)
★ 4.8 (435) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Stored Procedure, Hibernate (Java), PL/SQL, Relational Databases, Object-Relational Mapping, SQL, Data Access, Java Platform Enterprise Edition (J2EE), Databases, Database Design, Data Persistence, Object Oriented Design, Java, Data Manipulation, Data Mapping, Java Programming, Database Development, JUnit, Object Oriented Programming (OOP), Database Software
★ 4.7 (56) · Beginner · Specialization · 1 - 3 Months