如何在JChart2D上提出个人观点？

Chart2D chart = new Chart2D();
ITrace2D trace = new Trace2DSimple();
// Add the trace to the chart:
chart.addTrace(trace);
trace.setTracePainter(new TracePainterDisc(4));

trace.setTracePainter(new TracePainterDisc(4)); 

Chart2D test = new Chart2D();
JFrame frame = new JFrame(\"Chart2D- Debug\");

frame.setSize(400,200);
frame.setVisible(true);
ITrace2D atrace = new Trace2DLtd(100);

atrace.setPointHighlighter(new PointPainterDisc(5));
test.addTrace(atrace);
while(expression){
  atrace.addPoint(adouble,bdouble);
  ....
}

trace.setTracePainter(new TracePainterDisc());