먼저 JDK 를 다운 받고
$ sudo mkdir /usr/lib/jvm
$ sudo mv ~/Downloads/jdk1.7.0_06 /usr/lib/jvm/java-7-sun
$ sudo chown -R root.root /usr/lib/jvm/java-7-sun/
$ sudo apt-get install java-common
$ sudo apt-get install autoconf
$ sudo update-alternatives --install /usr/bin/java java
/usr/lib/jvm/java-7-sun/bin/java 0
$ sudo update-alternatives --install /usr/bin/javac javac
/usr/lib/jvm/java-7-sun/bin/javac 0