Ubuntu java的纠结

http://maciek.hubpages.com/hub/Ubuntu-Install-Sun-Java-Alternatives http://askubuntu.com/questions/141791/is-there-a-way-to-update-all-java-related-alternatives http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux

关于update-java-alternatives命令 他读取的java设定来自/usr/lib/jvm/的隐藏文件,例:.java-7-oracle.jinfo