private JFreeChart createHeapChart(double maxMemory)
{
TimeSeriesCollection dataSet = new TimeSeriesCollection();
dataSet.addSeries(memoryUsageSeries);
dataSet.addSeries(heapSizeSeries);
JFreeChart chart = ChartFactory.createXYAreaChart("JVM Heap",
"Time",
"Megabytes",
dataSet,
PlotOrientation.VERTICAL,