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: Javascript, Restful API, Web Development
Intermediate · Course · 1 - 4 Weeks

University of Maryland, College Park
Skills you'll gain: Team Motivation, Negotiation, Team Leadership, Product Roadmaps, Team Building, Organizational Leadership, Conflict Management, Leadership, Scaled Agile Framework, Strategic Leadership, Agile Methodology, Leadership and Management, Product Management, Business Leadership, Team Management, People Development, Cross-Functional Collaboration, Product Development, Product Strategy, Decision Making
Beginner · Course · 1 - 3 Months

Northeastern University
Skills you'll gain: Database Design, Database Theory, Database Management, Relational Databases, Databases, Database Architecture and Administration, Database Management Systems, SQL, NoSQL, Data Modeling, Unified Modeling Language, Query Languages, Data Integrity, Data Manipulation, Performance Tuning
Build toward a degree
Mixed · Course · 1 - 3 Months

Skills you'll gain: Web Development, Web Design and Development, Web Applications, Data Structures, Javascript, Programming Principles, Object Oriented Programming (OOP), Computational Thinking
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Cloud Infrastructure, Virtualization, Software-Defined Data Center (SDDC), VMware ESX Servers, Virtual Machines, Virtualization and Virtual Machines, vCenter Server, Cloud Computing, Containerization
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Google Workspace, Lightweight Directory Access Protocols, Active Directory, Gmail, User Accounts, Collaborative Software, Automation, Identity and Access Management, Configuration Management, Systems Integration
Intermediate · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Event-Driven Programming, User Interface (UI), Software Design, UI Components, User Interface (UI) Design, Application Design, Development Environment, Cross Platform Development, Application Development, Data Entry
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Deepseek, Model Deployment, AI Enablement, LLM Application, Generative Model Architectures, Competitive Analysis, AI Product Strategy, AI Workflows, Application Deployment, Organizational Strategy, Data Ethics, Model Evaluation, Automation, Integration Testing, Cost Reduction, Process Optimization, Program Evaluation
Intermediate · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Network Performance Management, Network Monitoring, Performance Tuning, Virtual Networking, Google Cloud Platform, Performance Testing, Network Analysis, Hardware Architecture, Intranet
Intermediate · Project · Less Than 2 Hours

Skills you'll gain: Unreal Engine, Game Design, Virtual Environment, Virtual Reality, Simulations, Augmented and Virtual Reality (AR/VR)
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Full-Stack Web Development, Jest (JavaScript Testing Framework), Application Deployment, Unit Testing, JavaScript Frameworks, Data Structures, Back-End Web Development, Restful API, Application Programming Interface (API), Development Environment, Javascript, Front-End Web Development
Beginner · Course · 1 - 3 Months
Duke University
Skills you'll gain: Data-Driven Decision-Making, Logistic Regression, Statistical Modeling, Model Evaluation, Predictive Modeling, Regression Analysis, R Programming, Statistics, Data Analysis, Probability & Statistics, Statistical Inference
Beginner · Course · 1 - 4 Weeks