Ubuntu下安装java环境遇到的问题

$sudo apt-get install sun-java6-jre sun-java6-jdk sun-java6-demo sun-java6-doc sun-java6-source sun-java6-plugin sun-java6-fonts libmyodbc tdsodbc
..........
正在设置 sun-java6-doc (6-07-3ubuntu2) ...
This package is an installer package, it does not actually contain the
JDK documentation.  You will need to go download one of the
archives:

    jdk-6-doc.zip jdk-6-doc-ja.zip

(choose the non-update version if this is the first installation).
Please visit

   

now and download.  The file should be owned by root.root and be copied
to /tmp.

[Press RETURN to try again, 'no' + RETURN to abort]

我在安装java环境时，遇到了如上问题，不知如何解决，请大家帮忙看一下。