0. download & tar xvf
1. sudo vim ~/.bashrc
export JAVA_HOME=/usr/lib/jvm/java
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
2. source ~/.bashrc
3. java -version
原文：http://www.cnblogs.com/WeRtogether/p/4484408.html