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: Pseudocode, Responsive Web Design, Computational Thinking, LinkedIn, Cascading Style Sheets (CSS), Front-End Web Development, React.js, HTML and CSS, Debugging, Algorithms, Interviewing Skills, UI Components, JavaScript Frameworks, Web Development Tools, Computer Programming, Web Development, Data Structures, JSON, Javascript, Software Development
Intermediate · Specialization · 1 - 3 Months

Google Cloud
Skills you'll gain: Cloud Applications, Google Cloud Platform, Cloud API, Application Development, Cloud Storage, Microservices, Dataflow, Data Store, Data Storage, Transaction Processing, Node.JS, Scalability
Intermediate · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Web Development, Database Design, Relational Databases, Web Applications, Web Development Tools, Databases, Full-Stack Web Development, Application Deployment, Server Side, HTML and CSS, Back-End Web Development, Application Development, Cloud Applications, Front-End Web Development, JavaScript Frameworks, Web Servers, Scripting, Javascript, Network Protocols, Cloud Computing
Build toward a degree
Intermediate · Course · 1 - 3 Months

Infosec
Skills you'll gain: Open Web Application Security Project (OWASP), Secure Coding, Application Security, Web Applications, Javascript, Web Development, Node.JS, Web Servers, Hypertext Markup Language (HTML), Java Programming
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Simple Object Access Protocol (SOAP), Restful API, Web Services, Hypertext Markup Language (HTML), HTML and CSS, Java Platform Enterprise Edition (J2EE), Software Design, Java, Extensible Markup Language (XML), Application Programming Interface (API), JSON, Software Architecture, Web Design and Development, Web Applications, Front-End Web Development, Web Development, Server Side
Beginner · Specialization · 1 - 3 Months
Skills you'll gain: Django (Web Framework), React.js, Authentications, Performance Tuning, Scalability, Full-Stack Web Development, Unit Testing, Development Testing, Software Testing, Development Environment, Restful API, Javascript, Python Programming
Advanced · Course · 1 - 4 Weeks
Skills you'll gain: Web Content Accessibility Guidelines, User Interface (UI), Usability, Front-End Web Development, UI Components, HTML and CSS, Semantic Web, Cascading Style Sheets (CSS), Javascript
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Spring Boot, Database Design, Object-Relational Mapping, Application Frameworks, Data Modeling, Database Development, Java Platform Enterprise Edition (J2EE), Application Development, Database Architecture and Administration, Requirements Analysis
Beginner · Guided Project · Less Than 2 Hours

LearnKartS
Skills you'll gain: Git (Version Control System), GitHub, Bitbucket, Version Control, Software Versioning, GitLab, Software Configuration Management, Collaborative Software, Integrated Development Environments, Software Development, Software Installation, Code Review, Devops Tools, IntelliJ IDEA, Eclipse (Software), File Management, Application Lifecycle Management, Linux, Release Management, Command-Line Interface
Beginner · Specialization · 1 - 3 Months

Scrimba
Skills you'll gain: React Redux, React.js, Cascading Style Sheets (CSS), JavaScript Frameworks, Front-End Web Development, Network Routing, User Interface (UI), UI Components, Web Frameworks, Maintainability, Authentications, Web Development Tools, Application Frameworks, Application Programming Interface (API), Web Design, Restful API, Authorization (Computing), Software Design, Javascript, Web Development
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Pseudocode, Computational Thinking, Debugging, Algorithms, Front-End Web Development, Javascript, Computer Programming, Data Structures, JSON, Web Development, Object Oriented Programming (OOP)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Extensible Markup Language (XML), Ajax, Extensible Languages and XML, Web Design, Java Platform Enterprise Edition (J2EE), Cascading Style Sheets (CSS), Data Validation, Web Applications, Scripting, Javascript and jQuery, Web Development, Android Development, Hypertext Markup Language (HTML), Middleware, Model View Controller, Web Services, Hibernate (Java), Visualization (Computer Graphics), Java, Mobile Development
Beginner · Specialization · 3 - 6 Months