ReMark from http://www./?p=10442
修改source，将9.10的源改成9.04的源。
deb http://run./ubuntu/ jaunty main restricted universe multiverse
deb-src http://run./ubuntu/ jaunty main restricted universe multiverse
deb http://run./ubuntu/ jaunty-updates main restricted universe multiverse
deb-src http://run./ubuntu/ jaunty-updates main restricted universe multiverse
deb http://run./ubuntu/ jaunty-backports main restricted universe multiverse
deb-src http://run./ubuntu/ jaunty-backports main restricted universe multiverse
deb http://run./ubuntu/ jaunty-security main restricted universe multiverse
deb-src http://run./ubuntu/ jaunty-security main restricted universe multiverse
update之后，用sudo apt-get install sun-java5-jdk 即可像以往一样安装java 1.5
安装后的基本设置：
sudo update-alternatives --config java
sudo update-java-alternatives -s java-1.5.0-sun
这时候再用java -version就能看到java 1.5已经正常工作了
最后把源换回9.10的
