配置环境变量


vi ~/.bashrc

在最后面加上如下四句


export JAVA_HOME=/usr/java/java7
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

保存后退出vi 刷新变量使配置立即生效


source ~/.bashrc




测试


snowdream@snowdream:~$ java -version  
java version "1.7.0" 
Java(TM) SE Runtime Environment (build 1.7.0-b147)  
Java HotSpot(TM) Server VM (build 21.0-b17, mixed mode)