Emacs not coloring java code

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http://ubuntuforums.org – When I first installed ubuntu, Emacs would provide coloring on my java code to denote variables and so forth. Since, that feature has stopped working. When I ssh into another computer and use its version of Emacs, the coloring works fine. Removing and reinstalling Emacs hasn't had any effect. Any ideas what might be going on? (Hardware)