I need to uninstall Java jdk1.6.0.27 from RHEL 5.7 and then install another version jre-7u40-linux-x64.rpm.
The firs thing I did was to find out the current java version installed using the 
`java -version` command and the output is `"java version "1.6.0_27"`".
After that I tried to check the previews version of java with the command: 

```
rpm -qi jdk

```

The output is `"package jdk is not installed"`
After installing the package jre-7u40-linux-x64.rpm in the `/usr/java` directory there are two java packages. 
The output of the `ls` command on `/usr/java` is:
`default jdk1.6.0_27 jre1.7.0_40 jre-7u40-linux-x64.rpm latest`.

when I run the command "`alternatives --config java`" the output is:

```
*+ 1   /usr/java/latest/bin/java

```

I am new to RHEL and I need some help to understand the situation.

To conclude I need some help to remove the previews jdk1.6.0.27 and to install jre1.7.0\_40.

Thank you in advance for your help!
Best regards,
Claudio