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: JSON, Restful API, Web Applications, Application Programming Interface (API), Responsive Web Design, Cascading Style Sheets (CSS), Event-Driven Programming, Ajax, Web Services, HTML and CSS, Javascript, Web Design and Development, Wireframing, Web Development, Real Time Data, Web Development Tools, Web Servers, Game Design, Hypertext Markup Language (HTML), Software Development
Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: JUnit, Apache Maven, Unit Testing, Spring Framework, Spring Boot, Restful API, Software Testing, Test Case, Gradle, API Design, Software Development Tools, Integration Testing, JSON, Authentications
Intermediate · Course · 1 - 3 Months

University of Michigan
Skills you'll gain: Data Ethics, Policy Analysis, Analytical Skills, Case Studies, Data Analysis, Responsible AI, Public Policies, Data Presentation, Data-Driven Decision-Making, Ethical Standards And Conduct, Data Governance, R Programming, Machine Learning, Predictive Modeling
Intermediate · Course · 1 - 4 Weeks

Erasmus University Rotterdam
Skills you'll gain: R Programming, Statistical Modeling, Regression Analysis, Correlation Analysis, Statistical Analysis, R (Software), Data Modeling
Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Apache Hadoop, Big Data, Apache Hive, Apache Spark, NoSQL, Data Infrastructure, File Systems, Data Processing, Data Management, Analytics, Data Science, SQL, Query Languages, Data Manipulation, Java, Data Structures, Distributed Computing, Scripting Languages, Data Transformation, Performance Tuning
Intermediate · Specialization · 3 - 6 Months

Johns Hopkins University
Skills you'll gain: Social Network Analysis, Network Analysis, Data Visualization, Graph Theory, Relational Databases, Data Visualization Software, Data Storytelling, Data Analysis, Database Theory, Exploratory Data Analysis, Social Sciences, Statistical Analysis, Machine Learning, R Programming, Analytics, Sociology, Natural Language Processing, Data Manipulation, Text Mining, Statistical Modeling
Intermediate · Specialization · 3 - 6 Months

University of Michigan
Skills you'll gain: Histogram, Data Visualization, Data Literacy, Data Presentation, Descriptive Statistics, Data Storytelling, Statistics, Data Analysis, Statistical Visualization, Sampling (Statistics), Data Validation
Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Rust (Programming Language), Application Programming Interface (API), Server Side, Back-End Web Development, System Programming, Web Frameworks, Web Development, Web Servers, Scalability, Maintainability, Secure Coding, Debugging, Application Development, Authentications, Authorization (Computing)
Intermediate · Specialization · 1 - 3 Months

Microsoft
Skills you'll gain: Microsoft Copilot, Microsoft Visual Studio, GitHub, Code Review, Integrated Development Environments, Program Development, Software Documentation, Maintainability, Computer Programming Tools, Test Automation, Web Development Tools, Software Technical Review, Technical Documentation, Test Case, Debugging, React.js
Beginner · Course · 1 - 4 Weeks

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

Digital Marketing Institute
Skills you'll gain: Marketing Budgets, Customer experience strategy (CX), Customer experience improvement, Cross-Channel Marketing, Digital Media Strategy, Digital Marketing, Digital Transformation, Marketing Planning, Marketing Effectiveness, MarTech, Marketing Strategy and Techniques, Customer Insights, Return On Investment, Agile Methodology, Consumer Behaviour, Strategic Thinking, Key Performance Indicators (KPIs), Social Media, Social Media Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Extensible Markup Language (XML), Extensible Languages and XML, Cascading Style Sheets (CSS), HTML and CSS, Data Validation, Data Mapping, Verification And Validation, Data Sharing, Javascript, Document Management, Hypertext Markup Language (HTML), Technical Documentation, Interoperability, Maintainability, Data Integrity, Information Architecture, Software Documentation, Data Management, Scripting, Web Content Accessibility Guidelines
Beginner · Specialization · 3 - 6 Months