i have make a jtree program in java and if the node is circle then the circle can be shown in frame and i have to resize it with slider . plz help me i have done the tree program bt how to get selected node means its circle of any thing else i can't get it ..

someone plz help me
i have attached my program with this


Code:
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
...