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.

Skills you'll gain: Javascript, Scripting, Event-Driven Programming, Computational Logic, Maintainability, Object Oriented Programming (OOP), Programming Principles, Debugging, Web Development
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Responsive Web Design, User Interface (UI) Design, HTML and CSS, Front-End Web Development, Web Development Tools, Web Design and Development, Bootstrap (Front-End Framework), React.js, Javascript, UI Components, JavaScript Frameworks, Web Components, Software Development Tools, Semantic Web
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Javascript, Data Persistence, Scripting, Scripting Languages, Data Storage, Web Development, Functional Design, Data Structures, Business Logic, Game Design, Software Engineering
Beginner · Guided Project · Less Than 2 Hours
Codio
Skills you'll gain: OAuth, Web Development Tools, Authentications, Web Servers, Application Programming Interface (API), Cloud API, Restful API, Server Side, JSON, Software Documentation, Javascript, Web Services, Application Security
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: API Testing, Cucumber (Software), Behavior-Driven Development, JSON, Restful API, Application Programming Interface (API), Test Tools, Test Case, JUnit, Security Testing, Test Script Development, Test Data, Test Automation, Apache Maven, Authentications, Development Environment, Authorization (Computing)
Mixed · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Prometheus (Software), Data Processing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Spring Framework, Spring Boot, Model View Controller, Hibernate (Java), Java, Web Applications, Object-Relational Mapping, Application Deployment, Application Security, Database Application, Software Development Tools, Authentications, Development Environment, Authorization (Computing)
Intermediate · Course · 3 - 6 Months

Scrimba
Skills you'll gain: Cascading Style Sheets (CSS), HTML and CSS, Front-End Web Development, Javascript, Responsive Web Design, Maintainability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Selenium (Software), GitHub, Git (Version Control System), Version Control, CI/CD, File I/O, Object Oriented Programming (OOP), Test Automation, JUnit, Test Data, Unit Testing, Test Case, Regression Testing, Web Development Tools, Test Script Development, Software Testing, Javascript, Browser Compatibility, Scripting, Computer Programming
Beginner · Specialization · 3 - 6 Months

EDUCBA
Skills you'll gain: IntelliJ IDEA, Apache Maven, Build Tools, Integrated Development Environments, Software Development Tools, Version Control, Git (Version Control System), Development Environment, Computer Graphics, Debugging, Scripting Languages, Visualization (Computer Graphics), Databases, Relational Databases
Intermediate · Course · 1 - 4 Weeks

Xi'an Jiaotong University
Skills you'll gain: ASP.NET, .NET Framework, Web Development, Database Application, Object Oriented Programming (OOP), Web Applications, Javascript, HTML and CSS, Web Design, Data Access, Web Servers, Databases
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: JUnit, Test Automation, Selenium (Software), Test Case, Software Testing, Test Execution Engine, Test Data, Apache Maven, Automation, Application Frameworks, Software Design Patterns, Java, Maintainability, Extensible Markup Language (XML)
Beginner · Course · 1 - 3 Months