jdk环境变量配置

修改  sudo gedit /etc/profile

路径写自己

export JAVA_HOME=/usr/tools/jdk1.7.0_67 

export JRE_HOME=${JAVA_HOME}/jre  

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  

export PATH=${JAVA_HOME}/bin:$PATH