When comparing BlueJ vs Eclipse Che, the Slant community recommends Eclipse Che for most people. In the question“What are the best Java IDEs?” Eclipse Che is ranked 4th while BlueJ is ranked 6th. The most important reason people chose Eclipse Che is:
Ranked in these QuestionsQuestion Ranking
Pro Great IDE for beginners
BlueJ was created for educational purposes and is designed to be simple for those who are just learning.
Pro Easy to learn
Because BlueJ was created for teaching purposes, it is designed to be easy to use. It has a user-friendly and intuitive interface.
Pro Docker runtimes
Pro SSH + terminal
Built-in terminal with root access so you can make changes to your running machines. Being able to SSH into the workspace so you can use a desktop IDE is handy.
Pro GIT and SVN VCS support
Projects can be easily imported from any Git or Svn repository hosting service.
Pro Reproducible environment
Pro Custom commands
You can package up custom commands with your workspace and then use them (or share them) with everyone else.
Pro Portable workspaces
The workspace in Che includes project sources, IDE and the runtime. So if you hand your Che workspace definition to another user and they execute it they will get everything they need to build, run and debug the project.
Also the runtime is in a Docker container so it will work even if the second user is on a different OS than the original user who shared their workspace with them.
Che does a nice job to automatically map the service:port running in the Docker container (e.g. tomcat on 8080) to the Docker port it actually uses (something in the ephemeral range). You never need to figure that out - it's just made available when you run your server.
Pro Merge tool for VCS
Con Lack of features
There are very few features available in BlueJ that would would expect from an IDE. For example, syntax highlighting is minimal and there is no code completion.
Con Not good for big projects
BlueJ is much better suited for small projects. It is designed to be simple and quite basic, rather than to handle large applications.
Con Slow runtime
Online IDE is much slower than desktop one.