tar zxvf  jdk-7u67-linux-x64.tar.gz

cp -R jdk1.7.0_67  /usr/local/jdk1.7.0_67

vim /etc/profile

xport JAVA_HOME=/usr/local/jdk1.7.0_67
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$CLASSPATH

source  /etc/profile

ubuntu jdk