on install oracle jdk over ubuntu x86_64

Posted by Richard on Ask Ubuntu See other posts from Ask Ubuntu or by Richard
Published on 2012-10-15T15:36:54Z Indexed on 2012/10/15 15:53 UTC
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jdk

my ubuntu version is 12.04, and when cat /proc/version, it shows

Linux version 3.2.0-23-generic (buildd@crested) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu4) ) #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012
Linux yuzhe-HP 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

When to install oracle jdk over linux, it presents with two options x86 and x64. Here it presents with x86_64. Which version should I choose and what the meaning behind x86_64 and x64.

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