ubuntu server java

I setup a ubuntu 64bit server, and I want to install java on it, but I want to make sure it is a 64bit version of java. My theory is that the 64bit version of java could use all the memory of my server better. It's just my theory, so maybe I'm wrong about that.
Also, I can't seem to find instructions on how to get a 64bit version of java
usually i use this command to install java

sudo apt-get install openjdk-7-jre

but i don't know if this is a 32bit version.
so if there is a way to install 64bit java using apt-get, that would be preferred because I like how apt-get gets all the dependencies.  
any ideas?
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JeffBeallAsked:
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mccarlIT Business Systems Analyst / Software DeveloperCommented:
From looking around it appears that there isn't any 64-bit version available from apt repositories. However, Java is a standalone install, ie. no dependencies, so the install process is relatively easy. If you are happy to go this way, here is a link (one of many found on Google) on the process, including a link to the Oracle website to download it.

http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux

Note, that this is for Oracle's (formerly Sun's) JRE/JDK as opposed to OpenJDK version. You may want to be take that into account if you have any particular requirements for one or the other. (Actually, there are even more vendor's suppling JRE's but those are the two most common for Linux)
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CEHJCommented:
http://packages.ubuntu.com/raring/amd64/openjdk-7-jre/download

is what you need (for raring). apt should already know it needs that if you have installed the correct packages for your architecture (and that architecture IS amd64)
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JeffBeallAuthor Commented:
ok, I'll try those downloads,
so is my theory correct that if I use a software package written for a 64bit system on a 64bit system, I should be getting better use, or at least, more use of my memory?
I have 8gb of ram, and in the windows world, 32bit only uses roughly 4gb of ram.
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CEHJCommented:
so is my theory correct that if I use a software package written for a 64bit system on a 64bit system, I should be getting better use, or at least, more use of my memory?
Yes, your theory is right in the sense that more memory is available at one time and addressable.
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JeffBeallAuthor Commented:
thank you
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CEHJCommented:
:)
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