Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. 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.

Scrimba
Skills you'll gain: React.js, Javascript
Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Organizational Change, Change Management, Business Transformation, Culture Transformation, Organizational Leadership, Overcoming Objections, Drive Engagement, Digital Transformation, Business Leadership, Leadership, Stakeholder Analysis, Internal Communications, Stakeholder Management, Communication Strategies, Collaborative Software, Communication, Adaptability, Google Workspace, Planning
Intermediate · Course · 1 - 4 Weeks

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Apache Spark, Scala Programming, Big Data, Data Manipulation, Distributed Computing, Data Processing, Performance Tuning, SQL, Programming Principles, Data Storage Technologies
Intermediate · Course · 1 - 4 Weeks

University of Geneva
Skills you'll gain: Data-oriented programming, Operating Systems, Simulation and Simulation Software
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Blockchain, Cryptography, Cybersecurity, Network Security, Data Security, Key Management, Encryption, Data Integrity, Authentications, Authorization (Computing), Transaction Processing, Algorithms
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Spring Boot, React.js, Object-Relational Mapping, Restful API, YAML, Data Access, Web Applications, Databases, Application Performance Management, Full-Stack Web Development, Configuration Management, Command-Line Interface
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Blockchain, Frontend Integration, Transaction Processing, Event-Driven Programming, Front-End Web Development, JavaScript Frameworks, Event Monitoring, Full-Stack Web Development, Development Environment, Web Development, Web Applications, Program Development, React.js, Emerging Technologies, Application Development, Javascript, FinTech
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: NIST 800-53, Risk Analysis, Business Risk Management, Security Management, Continuous Monitoring, Security Controls, System Monitoring, Risk Management, Cybersecurity, Cyber Risk, Cyber Security Policies, Enterprise Security, Threat Detection, Auditing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Unity Engine, Game Design, Animation and Game Design, Video Game Development, User Interface (UI), UI Components, Debugging, Scripting, C# (Programming Language)
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Data Warehousing, Extract, Transform, Load, Snowflake Schema, Star Schema, Business Intelligence, Data Modeling, Database Design, Data Management, Data Integration, Performance Tuning, Databases, Data Transformation, Scalability
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, JavaScript Frameworks, Authentications, MongoDB, Postman API Platform, Restful API, Server Side, Middleware, JSON, Web Applications, Javascript, Back-End Web Development
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Apache Maven, Eclipse (Software), JUnit, Data Import/Export, Kotlin, Software Installation, Database Management, File Management
Beginner · Course · 1 - 4 Weeks