[java] not java performance

hi all i''m just curious about my game''s memory consumptions and cpu usage i think it''s too heavy to any computer it takes 40 megs memory!! and use 60% cpu usage!! and i still have many thing to do i''m afraid it''ll take my whole memory!! i compare to my finished game developed by delphi, and takes only 10 megs memory consumptions finished game takes only 10 megs compared to unfinished takes 40 megs. yummy is that my fault?? or jvm takes the responsible??