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.

Packt
Skills you'll gain: Node.JS, File I/O, Javascript, Event-Driven Programming, Web Applications, Web Servers, Software Installation, Server Side, Application Development, JSON, Real Time Data, Command-Line Interface, TCP/IP, OS Process Management
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Javascript, Application Deployment, Application Development, Web Development Tools, Programming Principles, JSON, Debugging, Data Storage
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Agile Methodology, Agile Software Development, Agile Project Management, Kanban Principles, Agile Product Development, Scrum (Software Development), Lean Methodologies, Sprint Retrospectives, Backlogs, Sprint Planning, Continuous Improvement Process, Stakeholder Engagement, Prioritization
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Spreadsheet Software, Financial Statements, Financial Statement Analysis, Financial Acumen, Excel Formulas, Microsoft Excel, Content Marketing, Balance Sheet, Profit and Loss (P&L) Management, Cash Flows, Registration, Web Servers
Beginner · Course · 1 - 3 Months

Whizlabs
Skills you'll gain: Amazon DynamoDB, Amazon Redshift, Database Management, Operational Databases, Transaction Processing, Data Migration, Amazon Elastic Compute Cloud, NoSQL, Redis, Relational Databases, Data Warehousing, Scalability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Bioinformatics, R Programming, Molecular Biology, Data Manipulation, Programming Principles, File I/O
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Cloud-Native Computing, Cloud Applications, Serverless Computing, Cloud API, API Gateway, Application Development, Google Cloud Platform, Authentications, Application Programming Interface (API), Identity and Access Management, Event-Driven Programming, Node.JS, Restful API, Microservices, Authorization (Computing)
Intermediate · Course · 1 - 3 Months

Duke University
Skills you'll gain: Education and Training, Adult Education, Community Development, Pedagogy, Compassion, Lifelong Learning, Discussion Facilitation, Growth Mindedness, Innovation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Pandas (Python Package), NumPy, Data Wrangling, Data Transformation, Data Manipulation, Pivot Tables And Charts, Data Preprocessing, Data Cleansing, Data Analysis, Numerical Analysis, Statistical Analysis, Data Structures, Descriptive Statistics
Mixed · Course · 1 - 4 Weeks
Skills you'll gain: Active Listening, Strategic Leadership, Interpersonal Communications, Verbal Communication Skills, Social Skills, Communication Strategies, Empathy, Diversity and Inclusion, Communication, Business Leadership, Leadership, Emotional Intelligence, Responsible AI, Conflict Management, Cultural Sensitivity, Coaching, Remote Access Systems
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: DeepSeek API, Deepseek, Retrieval-Augmented Generation, Model Deployment, AI Enablement, Make.com, Generative Model Architectures, LLM Application, Cloud Deployment, Embeddings, Software Documentation, Unit Testing, Key Management
Beginner · Course · 1 - 3 Months

Skills you'll gain: Web Development Tools, Javascript, Scripting Languages, Scripting, Browser Compatibility, Debugging, Development Environment, Maintainability
Intermediate · Course · 1 - 3 Months