I am new to installing CQ in my system. For better understanding and hands-on I am trying to setup CQ environment in my system but failing to download the CQ jar file. I can find the information about installation but first I need to download the jar file. Can anybody help me on this?
You can't download the .jar file by common means/channels. The way to get it is asking your channel/account manager on Adobe if you are a partner, or to download it from the partner portal, If I'm not mistaken (a lot of time since I don't use it). If you are a client, you should talk to you service provider about it.
I believe that the application is only avaliable to Adobe clients and partners.