Installation of the 64-bit JDK on RPM-based Linux Platforms
http://docs.oracle.com/javase/7/docs/webnotes/install/linux/linux-jdk.html
This procedure installs the Java Development Kit (JDK) for 64-bit RPM-based Linux platforms, such as Red Hat and SuSE, using an RPM binary file (.rpm) in the system location. You must be root to perform this installation.
These instructions use the following file:
jdk-7u
1. Download the file. Before the file can be downloaded, you must accept the license agreement.
2. Become root by running su and entering the super-user password.
3. Uninstall any earlier installations of the JDK packages.
# rpm -q -a | grep java
# rpm -e package_name
or
# yum -y remove package_name
4. Install the package.
# rpm -ivh jdk-7u
To upgrade a package:
# rpm -Uvh jdk-7u
5. Delete the .rpm file if you want to save disk space.
6. Exit the root shell. No need to reboot.