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: Responsive Web Design, Cascading Style Sheets (CSS), HTML and CSS, Javascript, Web Design, Web Design and Development, Event-Driven Programming, Development Environment, Web Development, Integrated Development Environments, Scripting, Web Applications, Hypertext Markup Language (HTML), Programming Principles, Graphic and Visual Design, Front-End Web Development, Interactive Design, Animations, Software Installation, Web Analytics and SEO
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: React.js, Continuous Deployment, Application Deployment, Cloud Deployment, Web Applications, UI Components, Javascript, Bootstrap (Front-End Framework), JavaScript Frameworks, Development Environment, User Interface (UI), Cascading Style Sheets (CSS), Application Programming Interface (API)
Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Ajax, jQuery, JSON, Javascript and jQuery, Extensible Markup Language (XML), Web Applications, Javascript, Extensible Languages and XML, Event-Driven Programming, Network Protocols
Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: UI Components, React.js, Javascript, JavaScript Frameworks
Intermediate · Course · 1 - 4 Weeks

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Scala Programming, Data Structures, Algorithms, Performance Tuning, Other Programming Languages, Functional Design, Performance Testing, Unsupervised Learning, Computer Programming
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: WordPress, Ajax, Development Environment, Content Management Systems, Content Management, Secure Coding, Web Development, Data Management, Web Design and Development, PHP (Scripting Language), Database Management, Dashboard Creation, Cascading Style Sheets (CSS), Application Security, Javascript
Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: React.js, JavaScript Frameworks, Javascript and jQuery, Javascript, Software Design Patterns, Code Reusability, Web Development, Application Development, Mobile Development
Advanced · Guided Project · Less Than 2 Hours

Skills you'll gain: Angular, Model View Controller, Web Applications, JavaScript Frameworks, Data Validation, Application Frameworks, Javascript, Application Development, Web Development
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Vue.JS, JavaScript Frameworks, Hypertext Markup Language (HTML), Web Development Tools, Web Applications, Front-End Web Development, HTML and CSS, Javascript, Microsoft Visual Studio, Data Storage
Intermediate · Guided Project · Less Than 2 Hours

EDUCBA
Skills you'll gain: Integrated Development Environments, Web Applications, HTML and CSS, Python Programming, Javascript, Design
Beginner · Course · 1 - 4 Weeks
Coursera
Skills you'll gain: Code Reusability, React.js, JavaScript Frameworks, Web Applications, UI Components, Application Development, User Interface (UI), Front-End Web Development, Javascript
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Authentications, OAuth, API Testing, Restful API, Application Programming Interface (API), JSON, Test Automation, Data Validation, Extensible Markup Language (XML), Test Script Development, Mockups, Test Tools, Extensible Languages and XML, Verification And Validation, Debugging
Intermediate · Course · 1 - 3 Months