Windows:

Double-click the install file (bluejsetup-203.exe).

This will run a standard installation. Follow the instructions on screen. The installer will install the executable bluej.exe. Execute this to run BlueJ.

If you have more than one Java version installed, BlueJ will let you select your preferred version the first time it is executed. This can be changed later by running the "vmselect" program, which will be installed into the same directory as BlueJ.

Macintosh:

Note: BlueJ requires Java 2, and thus runs only on MacOS X. Updating to the latest Java version (via the Software Update feature) is recommended.

Download and expand the install file (BlueJ-202.zip). Move the resulting folder to your preferred location (for example Applications).

Unix:

Run the installer by executing

java -jar bluej-203.jar

In the installer, select an installation directory and your JDK directory and install.

In the installed bluej directory, you will find a file named bluej. Execute this file to start BlueJ.

Note: This installer can be executed on any system with Java 2 installed (including Windows and MacOS), but Windows/MacOS specific icons and configurations will not be present.

Opening a project

After starting BlueJ, open a project by selecting "Open" from the Project menu. You can find some examples in the "examples" directory. After the project has been opened, right-clicking (Mac: control-clicking) a class lets you select a constructor from a pop-up menu to construct an object.