Marker label in point inside chart

I want to marker different point inside chart component like this example

I created chart from dataset and I want to marker this points that I show below by table.


With this function is possible to show all point inside chart but I want customize label and mark only few points.

from org.jfree.chart.labels import StandardXYItemLabelGenerator

Is possible?
Can someone help me?

It sounds like you are wanting xyText annotations

Yes is that.
But, I do not know to use it. Do you have any example?

You probably overlooked it, but the end of my post contained a link that will take you to many examples: