install oracle jdk

1. go to oracle to download jdk

2. install jdk
#chmod 777 jdk-6u41-linux-x64.bin
#./jdk-6u41-linux-x64.bin

3.mv jdk to /var/lib/jdk
#mv   jdk1.6.0_41 /var/lib/jdk

4.modify profile to add java
#vim /etc/profile

5.config java
#alternatives --install /usr/bin/java java /usr/lib/jdk/jre/bin/java 20000

#alternatives --install /usr/bin/java javaws /usr/lib/jdk/jre/bin/javaws 20000
#alternatives --install /usr/bin/java javac /usr/lib/jdk/jre/bin/javac 20000
#java -version