Installation guide of SAP GUI for JAVA

Hi Experts,

I have ECC6.0 IDES with ABAP+JAVA. Currently I have SAP GUI for Windows installed on my machine.

Now I want to install the SAP GUI for JAVA also.

1. Where can I have the installation guide of SAP GUI for JAVA

2. As I have GUI for Windows installed on my machine, will the installation of GUI for Java cause any conflict?

3.Please let me know the difference /utility of the two.

Thanks and Regards,

Moulinath Ray