oracle jdk 1.6 and 1.7 side by side

[aligo]

su
mkdir -p /opt/java
chmod +x jdk-6u33-linux-x64.bin
./jdk-6u33-linux-x64.bin
mv jdk1.6.0_33 /opt/java/
tar xvf jdk-7u5-linux-x64.tar.gz
mv jdk1.7.0_05 /opt/java/


ln -s /opt/java/jdk1.6.0_33 /opt/java/default
# or
ln -s /opt/java/jdk1.7.0_05 /opt/java/default

alternatives --install /usr/bin/java java /opt/java/default/jre/bin/java 20000
alternatives --install /usr/bin/javaws javaws /opt/java/default/jre/bin/javaws 20000

alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /opt/java/default/jre/lib/amd64/libnpjp2.so 20000

alternatives --install /usr/bin/javac javac /opt/java/default/bin/javac 20000

# alternatives --install /usr/bin/jar jar /opt/java/default/bin/jar 20000

export JAVA_HOME="/opt/java/default"