ubuntu配置java环境

把下载的jdk包放到/usr/lib/java。

然后 sudo gedit /etc/environment

把配置文件修改一下

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/java/jdk1.8.0_05/bin:/usr/lib/java/jdk1.8.0_05/jre/bin"
JAVAHOME=/usr/lib/java/jdk1.8.0_05
CLASSPATH=.:/usr/lib/java/jdk1.8.0_05/lib:/usr/lib/java/jdk1.8.0_05/jre/lib

就ok了