우분투 java

• Hellow World 
• Environment Variables For Java Applications

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-jdk7-installer

sudo vi /etc/profile

JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/*