* Simple: BlueJ has a deliberately smaller and simpler interface than professional environments like NetBeans or Eclipse. This allows beginners to get started more quickly, and without being overwhelmed. * Designed for teaching: BlueJ is deliberately designed with good pedagogy in mind. There is a popular textbook designed for teaching introductory university/college courses with BlueJ, and a site full of teaching resources. * Interactive: BlueJ allows you to interact with objects. You can inspect their value, call methods on them, pass them as parameters and more. You can also directly invoke Java expressions without compiling. Thus BlueJ is a powerful graphical shell/REPL for Java. * Portable: BlueJ runs on Windows, Mac OS X, Linux and other platforms which run Java. It can also run without installation from a USB stick. * Mature: BlueJ is over fifteen years old, but continues to be updated and supported by a full-time team. We aim to respond to all technical support requests within one working day. * Innovative: BlueJ has several features not seen before in other IDEs. Its object bench, code pad, and scope colouring were all original BlueJ features.

* Develop your software wherever you go. It'll be there, in the cloud, right where you left it. Use your browser to develop with hosted workspaces or install desktop packaging to experience a modern development environment for Java, JavaScript, CSS, and HTML. * Create the next generation of developer tooling with our extensible platforms. Use your imagination to build services and tools that can be assembled into new IDEs or packages tailored to your identity. We provide multiple platforms to build plug-ins for desktop tools, distributed services used by cloud IDEs, and browser interfaces. You can then publish plug-ins to our Eclipse Marketplace of 1000s. * An impressive collection of tools can be easily installed into your Eclipse desktop IDE, including GUI builders and tools for modeling, charting and reporting, testing, and more. * Customize and extend Eclipse and make it your own using their marketplace. * Extend the desktop and web-based IDEs by writing your own plug-ins using the Plug-in Development Environment (PDE), or mash up features to build the web IDE of your dreams.