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BlueJ vs Eclipse IDE for Java Developers: catalog facts
BlueJ	Eclipse IDE for Java Developers
Free Free and open source under the GPL-2.0 with the Classpath Exception.	Free Free and open source under the Eclipse Public License.
Windows, macOS, Linux	Windows
Designed for beginners learning Java Native installers for Windows, macOS and Linux, including ARM64	Full Java development environment in one package Open source under foundation governance
Java only Requires a 64-bit operating system; 32-bit users need the old 4.1.4 release	Heavier than lightweight code editors Foundation homepage covers many projects, so finding the IDE download takes a step
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only WITH Classpath-exception-2.0	License: EPL
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.