BlueJ vs Eclipse Che

BlueJ is a free development environment for building Java programs, designed for beginners and teaching. It runs on Windows, macOS and Linux, with current downloads requiring a 64-bit operating system. Its interactive tools let users create and inspect objects, call methods, and evaluate Java expressions without compiling. In the editor, scope highlighting distinguishes code blocks and can help reveal misplaced curly brackets. BlueJ 6.0.0 added Kotlin editing and execution, though some Kotlin features, including code completion, are not supported. Documentation includes a Git teamwork tutorial for BlueJ 4 and later. Third parties can add functionality through an extensions API; the listed extensions page covers BlueJ 4 and older, while BlueJ 5.0.0 rewrote the API. The free Blueroom site offers teaching resources for educators. BlueJ directs software questions to its FAQ, technical support contact and bug database, and says it aims to respond to technical support requests within one working day.

Eclipse Che is an open-source development environment that runs IDEs in Kubernetes. Users create workspaces from a Git repository or sample, then access them online through a browser. Visual Studio Code and JetBrains IDEs are available. Workspace definitions use Devfiles, YAML files that can be versioned with application source code, and a devcontainer configuration is listed. GitHub, GitLab, and Bitbucket identities can connect through OAuth. Teams can share a development setup by URL, and Che can run on public or private Kubernetes clusters, including self-hosted deployments. Access uses OIDC authentication and Kubernetes RBAC authorization. Enterprise support includes air-gapped networks, TLS certificates, proxies, and FIPS. Code is cloned to persistent storage by default, but other file changes disappear when a workspace stops unless stored on a persistent volume. Che is free, with no stated usage limits.