How to work on BO 3.1 and 4.1 Webi report on same machine

Hi,

I have to work on BO 3.1 and 4.1 webi reports. But as BO 4.1 needs Java version 8 where as 3.1 needs java 6 version.

So if i install Java 8 then 3.1 is not working. So how to make it work?

Thanks in advance,

Divya