Online Development Environments
repl.it
trinket.io
codeboard.io
compilejava.net
Desktop Development Environments
Setting Up Eclipse
jGrasp
Java Visualizer
Visualizer
Practice Websites
PracticeIt
CodeStepByStep
CodingBat
Big Java Late Objects Easy Exercises
Learning Java
Runestone
CodeAcademy
Chortle
Edhesive
Codio
Think Java