java -version
yum remove java
yum groupremove java
java -version
tar -zxvf jdk-8u60-linux-x64.tar.gz
vim /etc/profile
export JAVA_HOME=/opt/jdk1.8.0_60
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar: