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.

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

University of Michigan
Skills you'll gain: C++ (Programming Language), C (Programming Language), Object Oriented Programming (OOP), Data Structures, Computer Programming, Software Design, Python Programming, Java, Algorithms, Performance Tuning, Debugging
Intermediate · Course · 1 - 3 Months

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

University of Colorado Boulder
Skills you'll gain: Object Oriented Design, JUnit, Object Oriented Programming (OOP), Unified Modeling Language, Software Design Patterns, Software Testing, Software Engineering, Java, Java Programming, Application Design, User Interface and User Experience (UI/UX) Design, Unit Testing, Software Design, Software Architecture, API Design, Model View Controller, Program Development, Software Development, Test Driven Development (TDD), Databases
Intermediate · Specialization · 3 - 6 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: Cloud-Native Computing, Cloud Applications, Cloud API, Google Cloud Platform, Authentications, Serverless Computing, Identity and Access Management, API Design, Event-Driven Programming, Microservices, Node.JS, Authorization (Computing), Scalability
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: React.js, Routing Protocols, JavaScript Frameworks, Web Content Accessibility Guidelines, Front-End Web Development, UI Components, Performance Tuning, Debugging, Javascript, Software Design Patterns, Real Time Data, Authentications
Advanced · Course · 1 - 3 Months

Simplilearn
Skills you'll gain: C (Programming Language), Data Structures, Computer Programming, Programming Principles, Data Management, System Programming, Algorithms
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Javascript, Data Structures, Scripting, Computer Programming
Advanced · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Middleware, Node.JS, Development Environment, Application Development, JavaScript Frameworks, TypeScript, Web Applications, Web Development Tools, Application Programming Interface (API), Server Side, Javascript, Android Development, Dependency Analysis
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cloud Applications, Google Cloud Platform, Data Store, Application Development, Cloud API, Dataflow, Cloud Storage, Platform As A Service (PaaS), Data Storage, Node.JS, NoSQL, Scalability
Intermediate · Course · 1 - 3 Months