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.

Rice University
Skills you'll gain: Apache Kafka, Apache Spark, Apache Hadoop, Distributed Computing, Dataflow, Java Programming, Java, Software Architecture, Systems Architecture, Scala Programming, Data Structures, System Programming, Programming Principles, Servers, Application Frameworks, Debugging, Algorithms, Performance Tuning, Functional Design, Performance Testing
Intermediate · Specialization · 3 - 6 Months
Skills you'll gain: Model Evaluation, Model Deployment, Decision Tree Learning, Data Preprocessing, Classification Algorithms, Predictive Modeling, Random Forest Algorithm, Applied Machine Learning, Java, Program Evaluation, Machine Learning, Feature Engineering, Algorithms, Program Implementation, Business Development
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: .NET Framework, Application Deployment, Bootstrap (Front-End Framework), Full-Stack Web Development, Database Management, User Accounts, Payment Systems, Authentications, Role-Based Access Control (RBAC), Data Modeling, Transaction Processing
Intermediate · Course · 3 - 6 Months

LearnQuest
Skills you'll gain: Java, Java Programming, Eclipse (Software), Object Oriented Programming (OOP), Development Environment, Computer Programming, Program Development, Virtual Machines, Web Applications, Software Installation
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Identity and Access Management, Cloud Infrastructure, Google Cloud Platform, Cloud Computing, Data Storage, Role-Based Access Control (RBAC), System Monitoring, Cloud Storage, Security Controls, NoSQL, Encryption, Scalability
Intermediate · Course · 1 - 3 Months

Skills you'll gain: ASP.NET, Application Deployment, User Accounts, Authorization (Computing), Role-Based Access Control (RBAC), Microsoft Azure, OAuth, Identity and Access Management, Bootstrap (Front-End Framework), Database Management, Authentications, Email Automation
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Apache Maven, File I/O, Data Import/Export, Object Oriented Programming (OOP), JSON, Java Programming, Debugging, Object Oriented Design, JUnit, Software Documentation, Data Structures, Computer Programming, Restful API, Integrated Development Environments, Java, Programming Principles, Data Validation, Network Protocols, Unit Testing, Computer Science
Beginner · Specialization · 3 - 6 Months
Skills you'll gain: Build Tools, CI/CD, Software Development Tools, Java, Gradle, Apache Maven, MLOps (Machine Learning Operations), Package and Software Management, Dependency Analysis
Advanced · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Application Design, Application Development, UI Components, Event-Driven Programming, Integrated Development Environments, Java Programming, User Interface (UI), Java, Software Design
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Scaled Agile Framework, Agile Project Management, Agile Software Development, Agile Methodology, Scrum (Software Development), Sprint Planning, Kanban Principles, Lean Methodologies, Business Transformation, Project Management Institute (PMI) Methodology, Organizational Change, Sprint Retrospectives, Waterfall Methodology, Process Mapping, Continuous Improvement Process, Prioritization, Requirements Analysis
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Active Directory, Azure Active Directory, Group Policy, Hyper-V, Windows Servers, Virtualization and Virtual Machines, Cloud Infrastructure, Containerization, Hybrid Cloud Computing, Remote Access Systems, Microsoft Servers, Virtual Private Networks (VPN), Virtual Networking, Cloud Platforms, Microsoft Azure, Dynamic Host Configuration Protocol (DHCP), Data Storage Technologies, Windows PowerShell, Network Infrastructure, Cloud Storage
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Sales Enablement, Sales Management, Sales, Customer Analysis, Governance, Sales Strategy, General Sales Practices, Talent Management, Competitive Analysis, Marketing, Sales Operations, Target Market, Selling Techniques, Verbal Communication Skills, Persuasive Communication, Sales Training, Oral Expression, Market Share, Sales Process, Business
Beginner · Specialization · 1 - 3 Months