.BLUEJ File Extension
File TypeBlueJ Package File
What is a BLUEJ file?
Package file created by BlueJ, a Java development environment; holds the BlueJ package so when you click on it, the BlueJ program opens; also contains the date when the project it accompanies was created.
Whenever you create a new project in the BlueJ program, the .BLUEJ package will be created and saved in your specific project folder.
package.bluej - Name of the BLUEJ file that appears in your project folder.