Find open-jdk's src.zip in ubuntu.com

Ubuntu finds open-jdk's src.zip. When we use sun's JDK, the root directory contains a src.zip to view the source code of the system class library. When www.2cto.com is using open-jdk, the directory structure has changed and cannot be found for a while. But I don't believe I can't find it. Next: First, find the installed openjdk package to see what is installed. I am very happy to see the installation:/usr/lib/jvm/java-6-openjdk-i386/src.zip, but I used eclipse's attatch source to prompt that the file could not be found. I open the Directory and it is a link. The file linked to www.2cto.com is empty. So I found the openjdk-6-source software package, it seems the size is, so the installation. Then the main package includes the example src.zip. This is OK.