jdk

sudo mv jdk1.7.0_10 /usr/lib/jvm/

sudo gedit ~/.profile
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_10
export JRE_HOME=/usr/lib/jvm/jdk1.7.0_10/jre 
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$PATH

$ source ~/.profile