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: Dataflow, Java, Programming Principles, Application Frameworks, Algorithms, Performance Tuning, Computer Science
Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Project Closure, Project Management, Stakeholder Management, Project Management Life Cycle, Project Coordination, Risk Management, Conflict Management, Resource Management, Stakeholder Analysis, Change Management, Risk Analysis, Agile Methodology
Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Java Programming
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Eclipse (Software), Java, Java Programming, Functional Design
Intermediate · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Java Platform Enterprise Edition (J2EE), Scripting, Application Servers, Javascript and jQuery, Java, Apache Tomcat, Server Side, Hypertext Markup Language (HTML), Web Applications, Model View Controller
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Amazon Web Services, AWS Identity and Access Management (IAM), Amazon Elastic Compute Cloud, Amazon S3, Cloud Computing, Public Cloud, Cloud Storage, Data Storage Technologies, Cloud Infrastructure, Data Storage, Identity and Access Management, User Accounts, Cloud Security, Solution Architecture
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java, Application Servers, Web Applications, Development Environment, Java Programming, Application Development, Program Development, Object Oriented Programming (OOP), Mobile Development, Computer Programming, UI Components, User Interface (UI), Command-Line Interface, Debugging
Intermediate · Course · 1 - 4 Weeks

Rice University
Skills you'll gain: Apache Kafka, Apache Spark, Apache Hadoop, Distributed Computing, Java, Middleware, Scala Programming, Servers, Network Protocols
Intermediate · Course · 1 - 3 Months

Kotter
Skills you'll gain: Organizational Change, Change Management, Business Transformation, Leadership and Management, Organizational Structure, Organizational Leadership, People Management, Industrial and Organizational Psychology, Leadership Development, Leadership, Drive Engagement, Stakeholder Engagement, Diversity and Inclusion, Lifelong Learning
Beginner · Course · 1 - 4 Weeks

University of Colorado System
Skills you'll gain: Cryptography, Cybersecurity, Encryption, Key Management, Public Key Cryptography Standards (PKCS), Data Integrity
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Application Programming Interface (API), Software Testing, JSON, Java, Data Validation, Test Automation, Test Case, Development Environment
Mixed · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Java Programming, Integrated Development Environments, Application Frameworks, Performance Tuning, Performance Testing
Intermediate · Course · 1 - 4 Weeks