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: Sampling (Statistics), Statistical Hypothesis Testing, Data-Driven Decision-Making, Descriptive Statistics, Correlation Analysis, Data Analysis, Probability Distribution, Statistical Software, Statistics, Statistical Analysis, Estimation, R (Software), Data Visualization, Risk Analysis, Probability, Statistical Methods, R Programming, Return On Investment, Probability & Statistics, Problem Solving
Build toward a degree
Beginner · Specialization · 3 - 6 Months

Microsoft
Skills you'll gain: Debugging, R Programming, Data Structures, Microsoft Development Tools, Software Documentation, Programming Principles, Development Environment, Data Manipulation, Data Transformation, Scripting
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: JUnit, Unit Testing, Software Testing, Mockups, Test Case, Test Driven Development (TDD), Java
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cash Flows, Income Statement, Financial Analysis, Financial Accounting, Revenue Recognition, Generally Accepted Accounting Principles (GAAP), Revenue Management, Accrual Accounting, Finance
Mixed · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Social Network Analysis, Network Analysis, Graph Theory, Social Sciences, Statistical Analysis, R Programming, Sociology, Statistical Modeling, Statistical Hypothesis Testing
Intermediate · Course · 1 - 4 Weeks

University of California, Davis
Skills you'll gain: Chemical Engineering, Hazard Analysis, Safety Assurance, Process Engineering, Engineering Analysis, Environmental Engineering, Engineering Calculations, Mathematical Modeling, Applied Mathematics
Mixed · Course · 1 - 4 Weeks
Skills you'll gain: Django (Web Framework), Frontend Integration, React.js, API Testing, Authentications, Performance Tuning, Scalability, Full-Stack Web Development, Frontend Performance, Unit Testing, Development Testing, Software Testing, Restful API, Javascript, Python Programming
Advanced · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Electrical Power, Power Electronics, Electrical Systems, Torque (Physics), Electronic Components, Electric Power Systems, Electrical Equipment, Basic Electrical Systems, Semiconductors, Electrical Engineering, Mechanical Engineering, Mechanical Design, Electronic Systems, Engineering Calculations, Low Voltage, Electronics, High Voltage, Machine Controls, Energy and Utilities, Thermal Management
Beginner · Specialization · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Prompt Engineering, Large Language Modeling, LLM Application, ChatGPT, Generative AI, Responsible AI, Healthcare Ethics, Public Health, Data Ethics, Health Policy, Health Informatics, Medical Science and Research, Artificial Intelligence, Microsoft Copilot, Emerging Technologies
Mixed · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Application Security, Serverless Computing, Secure Coding, Risk Management Framework, Threat Modeling, Cloud Security, Infrastructure Security, Cloud Services, Web Applications, Cloud Platforms, Javascript, Node.JS, Amazon Web Services
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Rmarkdown, Box Plots, Plot (Graphics), Descriptive Statistics, Scatter Plots, Histogram, Jupyter, Matplotlib, Data Presentation, Ggplot2, Statistical Visualization, Data Manipulation, Statistical Hypothesis Testing, Regression Analysis, Correlation Analysis, Data Visualization, Data Visualization Software, Data Analysis, R Programming, Python Programming
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Responsive Web Design, HTML and CSS, Web Design, Web Design and Development, Cascading Style Sheets (CSS), Front-End Web Development, User Interface (UI), Browser Compatibility, Javascript, Mobile Development, Interactive Design
Intermediate · Guided Project · Less Than 2 Hours