building the android sdk

After compiling the android source, It's time to compile the sdk.
Remember before start compiling the sdk, you need to use the sun jdk 1.5.
use this command: update-alternatives --config java 
to switch to jdk5.
However, when I'm compiling the sdk when follow the above steps, there are still error.
My solution is:
1. use lunch sdk-eng before make sdk(if the error still occur)
2. remove all the java sdk in my ubuntu such as openjdk and sun-java1.6.jdk(except jdk5)

And after these two steps, I successfully finished compiling the sdk
you can find the jdk in ~/out/host/${your_machine}/sdk
here is the layout:
drwxr-x--- 3 user user      4096 2011-04-18 10:11 .
drwxr-xr-x 9 user user      4096 2011-04-18 10:10 ..
drwxrwx--- 7 user user      4096 2011-04-18 10:10 android-sdk_eng.user_linux-x86
-rw-r--r-- 1 user user 172889941 2011-04-18 10:11 android-sdk_eng.user_linux-x86.zip
-rw-r--r-- 1 user user    648232 2011-04-18 10:11 sdk_deps.mk


steps review:
                     sudo update-alternatives --config java(change to jdk5)
                     lunch sdk-eng
                     make sdk