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.

LearnKartS
Skills you'll gain: Apache Kafka, Apache Spark, Prometheus (Software), Data Pipelines, Distributed Computing, Real Time Data, Data Processing, Security Controls, Configuration Management, Application Performance Management, Performance Tuning, Encryption, Authorization (Computing), Authentications, Data Storage Technologies, Server Administration, Network Monitoring, File Management
Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Javascript, User Interface (UI), Web Development, Web Development Tools, Scripting, Hypertext Markup Language (HTML)
Beginner · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Microservices, Spring Boot, Software Architecture, API Gateway, Spring Framework, Service Oriented Architecture, Cloud Computing Architecture, Load Balancing, Systems Architecture, Web Services, Cloud Services, Software Design Patterns, Scalability, Restful API
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: TypeScript, Programming Principles, Web Development Tools, Javascript, Web Language
Beginner · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Angular, Node.JS, Full-Stack Web Development, HTML and CSS, User Interface (UI), Application Deployment, Back-End Web Development, Javascript, MongoDB, User Interface (UI) Design, Front-End Web Development, Web Applications, JavaScript Frameworks, Scalability, Restful API, Middleware, Bootstrap (Front-End Framework), jQuery, Databases, Cascading Style Sheets (CSS)
Intermediate · Specialization · 1 - 3 Months

University of London
Skills you'll gain: User Experience Design, User Experience, Wireframing, Persona (User Experience), Application Lifecycle Management, Application Design, Technical Communication, Web Design and Development, Prototyping, UI/UX Research, Web Development, User Research, Mockups, Usability Testing, Application Development, Responsive Web Design, Version Control, Brainstorming, Javascript, MongoDB
Mixed · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: React.js, Web Applications, Hypertext Markup Language (HTML), Front-End Web Development, JavaScript Frameworks, Javascript, Cascading Style Sheets (CSS), Web Development, User Interface (UI)
Intermediate · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Apache Kafka, Data Pipelines, Google Cloud Platform, Java, Public Cloud, Cloud API, Network Analysis
Beginner · Project · Less Than 2 Hours

University of London
Skills you'll gain: Hypertext Markup Language (HTML), Responsive Web Design, Web Design, Bootstrap (Front-End Framework), Web Development, Front-End Web Development, Cascading Style Sheets (CSS), Javascript, Development Environment
Mixed · Course · 1 - 3 Months

Skills you'll gain: Jest (JavaScript Testing Framework), CI/CD, Model View Controller, User Acceptance Testing (UAT), Continuous Integration, Cucumber (Software), Postman API Platform, Ansible, Software Testing, OAuth, Web Development Tools, Behavior-Driven Development, Application Performance Management, Prometheus (Software), Authentications, Test Driven Development (TDD), Package and Software Management, Cloud API, Javascript, Software Engineering
Beginner · Specialization · 3 - 6 Months

University of California, Davis
Skills you'll gain: Ajax, Javascript and jQuery, Data Validation, JSON, Javascript, Event-Driven Programming, Web Development Tools, Application Programming Interface (API), Object Oriented Programming (OOP), Maintainability, Debugging
Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Authentications, Application Security, Open Web Application Security Project (OWASP), Secure Coding, Serverless Computing, Cryptography, Risk Management Framework, Threat Modeling, Cloud Security, Infrastructure Security, Package and Software Management, Node.JS, Web Applications, Javascript, Vulnerability Management, Cloud Services, Cloud Platforms, Web Development, Identity and Access Management, Vulnerability Assessments
Intermediate · Specialization · 1 - 3 Months