graph - dynamically updating SimpleHistogramDataSet on certain event -

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i need example programs on simplehistogramdataset dynamically update graph when new responses server arrive...i new jfreechart actually...kindly send me links that can me building dynamic simplehistogramdataset on occurance of events(e.g. new responses arrive server)... have compare response times of 2 different server strategies ...ie..strategy1 send me 10,000 responses , create dynamic simplehistogramdataset strategy2 send me 10,000 responses , create simplehistogramdataset,,,but want draw 2 strategies output on same graph compare them....i dummy in jfreechart guide pe through proper links plz..


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