Why Does Installing The JDK On A 64bit OS Install 3 Copys of the JRE???

I am running Windows 7 Home Premium 64bit version. I recently installed the JDK and realized that along with it 3 copys of the JRE were installed. This is a brand new computer I am running that I just brought home a few days ago so I know there not older versions. Basically what I have is the following; I downloaded the 64bit JDK package and installed it on my system. Now I have the following set up and would like to know if I can safely uninstall any of these as I dont think I need all of them.
Under Program File(x86) I have the jre6 installed there, that is the 32bit version.
Under Program Files I have the jre6 installed there, as well as the jdk1.6.0_20 these are the 64bit versions. The troubling thing is that inside the jdk1.6.0_20 folder I have yet another jre installation.
Now I assume that I need both 32 and 64 bit versions on my system for whatever reason is the case. What I do not understand is why if the jre6 is already installed in both the 32 and 64 bit locations as indicated above, than why does it also get installed inside the jdk1.6.0_20 folder location?? I know that the jre comes bundled with the jdk but is that the jre that is located inside the jdk directory or is it the jre folder????
Could someone please explain to me exactly how this works and what version i can uninstall??? I am assuming that I can remove the seperate jre6 install that is located in the 64 bit program files location as then that would leave me with the 32bit jre still installed and I would also still have the jre that is installed inside the jdk folder...
Am I correct on this one??? Also another quick question.... If you need both 32 and 64bit jre's than why don't you need both 32 and 64bit jdks??? Also is it possible to just go ahead and run only the 32bit version on a 64bit machine???
Thanks in advance for any help

They bother me because I prefer to keep my system tidy as possible. I do not like to have extra things installed that just waste hard drive space. I am the type of person that keeps my system as clean as my house. I don't like having things laying around that are never going to be used and just waste space. Now in this case apparantly one of these copies of java is not going to be used ever. It makes no sense to me that if the jdk comes with the jre bundled, then why would it also install a seperate jre in another folder when there is already a jre contained within the jdk folder?????
I understand the purpose of the 32 bit install of the jre, but why would you have the following set up???
Program Files
jdk1.6.0_20>>jre
jre6Program Files(x86)
jre6Thats 3 copies of the jre and only 1 of the jdk?!?!?! I need one jre for 32bit and one for 64bit, but why the extra copy in the 64bit location???
You mention uninstalling and reinstalling, but as I said earlier this pc is only a week old and all i did was download the 64bit jdk from the Java website and install it. So all that will accomplish is the same result. My question was trying to figure out if it is safe to remove the extra copy of the jre without losing any functions????? Or would it be better to just remove it all and install the 32bit version???? I read that the 64 bit is for Internet Explorer 64bit which i never use, I use google chrome and firefox which are both 32bit. The thing is though is that the jdk is what I need for programming. Does it matter whether its 64 or 32 bit????
Edited by: wakeup6620 on Jun 15, 2010 9:48 AM

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