Figure out what you need and download it. Currently CS1114 (Fall '10) is using [http://:moodle.cs.vt.edu Moodle] as an online interface for students. On Moodle in CS1114 on the 'Reference Shelf' you will see a link 'Installing/Updating BlueJ'. Here you will find what version of Java and BlueJ you need to install. First follow the link for the Java JDK, make sure you select linux (x86 for 32 bit, x64 for 64 bit, this has to match your operating system version) and download. Then download the BlueJ .jar package, its listed as "All other OSes: vtbluej-<version>.jar"