jdk 6.0

https://packages.debian.org/squeeze/sun-java6-jdk

添加源

deb http://ftp.cn.debian.org/debian squeeze main non-free
deb http://ftp.hk.debian.org/debian squeeze main non-free
deb http://ftp.tw.debian.org/debian squeeze main non-free
deb http://ftp.jp.debian.org/debian squeeze main non-free

sudo apt-get update
sudo apt-get install sun-java6-jdk
sudo apt-get -f install
sudo apt-get install sun-java6-jdk

sudo update-alternatives --config java

sudo update-alternatives --config javac

sudo update-alternatives --config javaws