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.

KodeKloud
Skills you'll gain: Cloud Computing, Cloud Solutions, Cloud Engineering, Amazon CloudWatch, Cloud Computing Architecture, Identity and Access Management, Data Migration
Beginner · Course · 1 - 3 Months

Skills you'll gain: Project Finance, Feasibility Studies, Cost Estimation, Financial Analysis, Risk Mitigation, Project Risk Management, Risk Analysis, Return On Investment, Capital Budgeting, Case Studies, Financial Acumen, Stakeholder Analysis, Finance, Commercial Lending, Corporate Finance, Loans, Cash Flows
★ 4.8 (13) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Keyword Research, Content Performance Analysis, Search Engine Optimization, Dashboard, AI Personalization, Campaign Planning, Scheduling, Search Engine Marketing, Web Analytics, Project Planning, Generative Engine Optimization (GEO), Email Automation, Customer Analysis, Digital Marketing, Content Strategy, Generative AI Agents, Market Intelligence, Performance Analysis, Marketing Design, Strategic Partnership
★ 3.7 (7) · Beginner · Professional Certificate · 3 - 6 Months

LearnQuest
Skills you'll gain: Data Warehousing, Data Architecture, Data Infrastructure, Data Storage, Database Administration, Extract, Transform, Load, Database Architecture and Administration, Data Integration, Cloud Storage, Data Mart, Data Storage Technologies, Database Design, Operational Data Store, Database Systems, Query Languages, Data Persistence, Metadata Management
★ 3.8 (69) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Microservices, DevOps
★ 4.2 (54) · Advanced · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Design Thinking, Business Modeling, Entrepreneurship, Value Propositions, New Product Development, Market Opportunities, Ideation, Gap Analysis, Innovation, Technology Strategies, Strategic Thinking, New Business Development, Engineering Management, Technology Solutions, Market Analysis, Business Strategies, Business Strategy, Competitive Analysis, Sustainable Business, Engineering
★ 4.2 (46) · Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Git (Version Control System), GitHub, Version Control, Integrated Development Environments, IntelliJ IDEA, Software Development Tools, Eclipse (Software), Code Review, CI/CD, Microsoft Visual Studio, Development Environment, Software Versioning, Collaborative Software, Continuous Integration, Software Development, Remote Access Systems, Configuration Management, DevOps, Open Source Technology, Release Management
★ 4.1 (37) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Agentic Workflows, Generative AI Agents, Agentic systems, AI Orchestration, OpenAI API, AI Workflows, OpenAI, LLM Application, AI Integrations, Performance Tuning, Real Time Data, Tool Calling, Prompt Patterns, Prompt Engineering, Token Optimization, Application Programming Interface (API), Software Architecture
★ 3.8 (9) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Open Source Technology, Package and Software Management, Web Development, Linux, Shell Script, Database Design, Ubuntu, Relational Databases, Web Applications, Web Development Tools, Unix Shell, Test Driven Development (TDD), Python Programming, Linux Administration, Databases, Object Oriented Programming (OOP), Object Oriented Design, Scripting Languages, Javascript, Database Management
★ 4.6 (68) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Networking Hardware, Network Monitoring, OSI Models, Routing Protocols, Software-Defined Networking, Network Troubleshooting, Network Architecture, Network Protocols, Distributed Denial-Of-Service (DDoS) Attacks, General Networking, Network Security, TCP/IP, Network Routing, Computer Networking, Open Shortest Path First (OSPF), Cloud Technologies, Network Infrastructure, Hardening, Network Performance Management, Authentications
★ 4.5 (19) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Restful API, Spring Framework, Microservices, Cloud Deployment, API Design, Spring Boot, OAuth, Java Programming, System Design and Implementation, Java, Systems Design, Systems Architecture, Software Architecture, Software Design, Web Design and Development, Sprint Planning, NoSQL, SQL, Databases, Product Management
Beginner · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Statistical Inference, Regression Analysis, Statistical Programming, R Programming, Statistical Methods, Statistical Analysis, Statistical Modeling, R (Software), Statistical Software, Data Science, Data Analysis, Probability & Statistics, Linear Algebra
★ 4.6 (31) · Intermediate · Course · 1 - 4 Weeks