######Installing Oracle Java:
- List the java that is currently in use:
# update-alternatives --display javac # mkdir /opt/oracle-jdk7# tar -zxf jdk-7*.tar.gz -C /opt/java-oracle/# update-alternatives --install /usr/bin/java java /opt/java-oracle/jdk1.X.X_XX/bin/java 20000# update-alternatives --install /usr/bin/javac javac /opt/java-oracle/jdkX.X._XX/bin/javac 20000# update-alternatives --config java