To complete the exercises on your own computer, please install Eclipse and the AspectJ Development Tools (AJDT).
You can download and install AJDT by configuring the “Update site URL” inside the Eclipse Update Manager (which is available through the menu Help → Software Updates).
AJDT already includes a complete AspectJ compiler, so there is no need to install it separately.
You can verify the AJDT installation through the menu Help → About Eclipse SDK.
Start the exercises at the Basics track.