[CentOS] Any Alternative for X window System

hi ,
            I have one problem in centos4.4.That is when i run a java Swing
Based application(non stop Application ie ,24/7) in centos4.4 the X Window
system takes 100% of cpu usage....When i restart the system it will come
down.After few hours it will again go to 100%...please tell me solution.....
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