A Java Tutorial by examples
For an introductory tutorial on how to use Jenkins
Tutorial repository focused on teaching IntelliJ IDEA
Tutorial and sample-code repository
Spring and Spring Boot Tutorial For Absolute Beginners
Curated list of project-based tutorials
A collection of practical tips can be found at the bottom of this page
Java Tutorial For Beginners with 500 Code Examples
a tool to learn about Chinese (and Japanese) characters
Ferramenta de Ajuda
MathTools is an aid in preparing printed math tests.