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.

University of Colorado Boulder
Skills you'll gain: Statistical Modeling, Statistical Machine Learning, Data Science, Statistical Methods, Statistical Analysis, Model Evaluation, Regression Analysis, Predictive Modeling, R Programming, Machine Learning, Classification Algorithms, Supervised Learning, Unsupervised Learning, Machine Learning Algorithms
Build toward a degree
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Responsive Web Design, Restful API, User Interface (UI) Design, Application Programming Interface (API), Web Development Tools, Database Design, HTML and CSS, API Design, Front-End Web Development, MongoDB, Javascript, Postman API Platform, Bootstrap (Front-End Framework), React.js, UI Components, Ajax, Database Management, OAuth, Frontend Integration, Authentications
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: GitHub, Git (Version Control System), Version Control, Unix Commands, Unix Shell, Software Versioning, Linux Commands, Command-Line Interface, Devops Tools, Collaborative Software, Code Review, Software Configuration Management, Software Development Tools, Secure Coding, File Management, Technical Documentation, Software Documentation
Intermediate · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: Angular, Front-End Web Development, HTML and CSS, Responsive Web Design, React.js, JavaScript Frameworks, Web Development, Web Components, Web Development Tools, UI Components, User Interface (UI), Event-Driven Programming, Maintainability, Software Design Patterns
Intermediate · Course · 1 - 4 Weeks

Cleveland Clinic
Skills you'll gain: Machine Learning Methods, Machine Learning, Machine Learning Algorithms, Healthcare Industry Knowledge, Health Informatics, Applied Machine Learning, Clinical Informatics, Health Care, Supervised Learning, Clinical Experience, Emerging Technologies, Artificial Intelligence, Reinforcement Learning, Data-Driven Decision-Making, Data Science
Beginner · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: Package and Software Management, File Systems, File Management, Linux Administration, Unix, Linux Commands, Unix Commands, Command-Line Interface, Operating Systems, System Monitoring, Open Source Technology, User Accounts, Software Installation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Electrical Safety, Maintenance, Repair, and Facility Services, Safety Standards, Hardware Troubleshooting, Test Equipment, Electrical Systems, Basic Electrical Systems, High Voltage, Safety and Security, End User Training and Support, Sustainable Technologies, Transportation Operations, Emerging Technologies
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Lean Six Sigma, Lean Methodologies, Statistical Hypothesis Testing, Correlation Analysis, Process Improvement, Sampling (Statistics), Project Management, Data Literacy, Regression Analysis, Process Capability, Goal Setting, Statistical Analysis, Scatter Plots, Customer experience improvement, Quality Management, Microsoft Excel, Process Mapping, Risk Management, Root Cause Analysis
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: File I/O, Object Oriented Programming (OOP), Debugging, JSON, Program Development, Data Structures, Code Review, Python Programming, Microsoft Visual Studio, Development Environment, Scripting, Maintainability, Integrated Development Environments, Package and Software Management, Authorization (Computing), Programming Principles, Computer Programming, Web Scraping, Application Programming Interface (API), Scalability
Beginner · Specialization · 3 - 6 Months

Duke University
Skills you'll gain: Storytelling, Teaching, Community Development, Discussion Facilitation, Research, Cultural Diversity
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Cloud Storage, Database Management, Cloud Platforms, Role-Based Access Control (RBAC)
Beginner · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Microservices, Network Monitoring
Intermediate · Course · 1 - 4 Weeks