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: Apache Hadoop, Real Time Data, Apache Spark, Apache Kafka, Data Integration, AWS Kinesis, Apache Hive, Data Pipelines, Big Data, Applied Machine Learning, Systems Design, System Design and Implementation, Distributed Computing, Query Languages, Data Processing, NoSQL, MongoDB, Data Import/Export, SQL, Scalability
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Javascript, Event-Driven Programming, Web Development, HTML and CSS, Scripting, Web Applications, Hypertext Markup Language (HTML), Programming Principles, Front-End Web Development, Interactive Design
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: React.js, Code Reusability, Javascript, Front-End Web Development, Web Development
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: JavaScript Frameworks, Node.JS, Web Frameworks, Restful API, Web Development, Web Applications, Application Programming Interface (API), Server Side, File Systems, Javascript, File I/O, Web Servers, Databases, Authentications, Middleware, Cryptography
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Java Programming, Java, Object Oriented Design, Data Structures, Computer Programming, Code Reusability
Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: JSON, UI Components, Application Deployment, Data Import/Export, Code Reusability, Web Frameworks, Web Design and Development, Front-End Web Development, Web Development Tools, Full-Stack Web Development, Web Development, HTML and CSS, Frontend Performance, Content Management, Cascading Style Sheets (CSS), Javascript
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Amazon Elastic Compute Cloud, Amazon Web Services, Cloud Hosting, Front-End Web Development, React.js, Cloud Deployment, Javascript, Full-Stack Web Development, Web Applications, Cloud Security, Hypertext Markup Language (HTML), Remote Access Systems
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: React Native, Mobile Development, Responsive Web Design, Cross Platform Development, Mobile Development Tools, UI Components, Application Development, Ajax, User Interface (UI), React.js, JavaScript Frameworks, Data Persistence, Data Store, Data Storage Technologies, Context Management, Development Environment, Javascript, Data Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Docker (Software), Containerization, Kubernetes, Development Environment, Spring Boot, Application Deployment, DevOps, Microservices, YAML, Debugging, MongoDB, Restful API
Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Agentic Workflows, Tool Calling, Agentic systems, AI Workflows, Google Gemini, AI Orchestration, Server Side, Gemini, Generative AI Agents, AI Integrations, Back-End Web Development, LLM Application, OpenAI API, Node.JS, Large Language Modeling, Web Development, PostgreSQL, Data Processing, Data Modeling, Javascript
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Back-End Web Development, Full-Stack Web Development, Server Side, Restful API, JavaScript Frameworks, Web Development, Web Frameworks, Frontend Integration, Web Applications, Web Servers, Javascript, Servers
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Email Automation, Google Sheets, Scripting, Google Workspace, Scripting Languages, Spreadsheet Software, Productivity Software, Automation, Hypertext Markup Language (HTML), Data Access, HTML and CSS, Javascript, Supplier Relationship Management
Beginner · Guided Project · Less Than 2 Hours