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Here is how to install the Sun Java SE Runtime Environment (JRE) on CentOS 5.3.

First, Execute the Binary:

> mv jre-6u16-linux-x64.bin /usr/lib/java
> cd /usr/lib/java
> chmod 744 jre-6u16-linux-x64.bin
> ./jre-6u16-linux-x64.bin

Download the 32-bit or 64-bit non-RPM binary from Sun’s site here and execute it.

Next, Set Sun’s Java as Default:

> update-alternatives --install "/usr/bin/java" "java" "/usr/lib/java/jre1.6.0_16/bin/java" 1
> update-alternatives --set java /usr/lib/java/jre1.6.0_16/bin/java

We configure the system to use Sun’s Java binaries to execute “java” commands by telling it there is an alternate installation and to use it by default.

Finally, Check the Default Version:

> java -version
java version “1.6.0_16″
Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode)