some o-r mapping tools can cache the objects that have been queried,then next time these objects are required,it don't need to access the database again,it can also monitor the database updating.
i wonder how i can implement such "cache" function MANUALLY? because i DON'T want to use ANY o-r mapping tools. i only use the jdbc to query database,then generate the object.

who can give me some clue?? or articles? or sample codes??

thank you!!!!!