ubuntu jdk config

----JDK环境变量
sudo gedit /etc/environment

export JAVA_HOME=/home/jun/install_package/jdk1.7.0_79
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH


source /etc/environment