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.

University of Washington
Skills you'll gain: Feature Engineering, Model Evaluation, Data Analysis, Model Training, Predictive Modeling, Data Wrangling, Statistical Modeling, Statistics, Data Science, Data-Driven Decision-Making, Data Preprocessing, Predictive Analytics, Data Collection, Applied Machine Learning, R Programming, Data Pipelines, Research, Supervised Learning, Technical Communication, Python Programming
★ 3.8 (26) · Mixed · Course · 1 - 3 Months

Skills you'll gain: Data Analysis, Machine Learning Algorithms, Statistical Analysis, Probability & Statistics, Probability Distribution, R Programming, Machine Learning Methods, Statistical Methods, R (Software), Applied Machine Learning, Statistical Machine Learning, Statistics, Statistical Modeling, Machine Learning, Statistical Inference, Classification Algorithms, Statistical Programming, Correlation Analysis, Data Manipulation, Supervised Learning
★ 4.6 (16) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Dashboard Creation, Dashboard, Data Preprocessing, Interactive Data Visualization, Data Visualization Software, Real Time Data, Data Analysis, Application Programming Interface (API), No-Code Development, JSON, Javascript
★ 4.3 (18) · Intermediate · Guided Project · Less Than 2 Hours

The State University of New York
Skills you'll gain: Calendar Management, People Analytics, Performance Analysis, Analytics, Data-Driven Decision-Making, Scheduling, Labor Relations, Workforce Management, Staff Management, Team Performance Management, Linear Algebra, Data Management, Administration, Contract Management, Team Management, Unsupervised Learning, R (Software), R Programming, Statistical Programming, Operations Management
★ 5 (6) · Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Query Languages, Software Installation, Performance Tuning, Distributed Computing, Scripting, Data Modeling, Application Programming Interface (API), Cloud Deployment
★ 3.6 (14) · Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: UI Components, Interactive Design, User Interface (UI), User Interface (UI) Design, Event-Driven Programming, Application Design, Development Environment, Application Development, Web Applications, Application Frameworks, Software Installation, Python Programming, Web Frameworks
★ 4.5 (25) · Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Data Visualization Software, Dashboard, Dashboard Creation, Data Visualization, Interactive Data Visualization, Data Transformation, Data Presentation, Tableau Software, Data Storytelling, Data Manipulation, Exploratory Data Analysis, Data Analysis
★ 3.8 (15) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Apache Kafka, Real Time Data, Data Pipelines, Java, Java Programming, Docker (Software), Development Environment
Intermediate · Course · 3 - 6 Months

Skills you'll gain: JUnit, Spring Framework, Spring Boot, Java Programming, Java, Apache Maven, Hibernate (Java), Unit Testing, Gradle, Microservices, Build Tools, Object-Relational Mapping, Software Testing, Cloud Development, Functional Design
Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Version Control, GitHub, Git (Version Control System), Data Transformation, Data Science, Data Analysis, R (Software), R Programming, Software Installation
★ 4.7 (107) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Statistical Hypothesis Testing, Logistic Regression, Lean Six Sigma, Correlation Analysis, Six Sigma Methodology, R (Software), R Programming, Statistical Programming, Statistical Analysis, Test Tools, Statistical Methods, Statistical Software, Regression Analysis, Probability & Statistics, Data Literacy, Data Science
★ 4.6 (14) · Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Data Manipulation, Tidyverse (R Package), Data Wrangling, Data Analysis, R Programming, R (Software), Data Transformation, Statistical Analysis
★ 4.6 (22) · Beginner · Guided Project · Less Than 2 Hours