on https://www.sdn.sap.com/sdn/developerareas/was.sdn?page=webas_tutorials.htm you can get some tutorial about the development of J2EE applications.
The Web AS 6.4 on Windows which you can download from SDN contains also the example code.
But I am using Web AS 6.4 on testdrive on Linux (http://www.sap.com/solutions/netweaver/linux/eval/nw4/). Here the example code is missing.
To get the code I had to download 800 MB with the Web AS 6.4 on Windows and had to install the server!
Is it possible to make the example code also available on SDN. This will make all Linux users happy.
May be it is possible to distribute the example code with the the SAP Web AS 6.4 testdrive which is coming out soon.
By the way the code runs excellent on the Web AS 6.4 on Linux.