Passing data to other classes

Question

I have two seperate classes in my program.
The class with main sends an LinkedList to the other class with this statement...
PanelB a = new PanelB();
a.setLink(points);Then in my other class I have this code...
public LinkedList q;Then I have a subclass with this code to accept the LinkedList...
public void setLink(LinkedList p, Graphics g){
q = p;At this point everything is great the data is passing along nicely.
Until I try to send the data to another sub class in the same class...
public void paint(Graphics g, LinkedList q) {
       int k = q.size();
       System.out.println(k);It compiles fine but the program does not print out the size of the LinkedList. It does print it out at every step though before this one. What am I missing or is there a better way of doing all of this?

Answer 1

Okay I messed with the code a little bit this is what I got.
public class shapeDraw{
public static void main (String[] args) {
  JFrame frame = new JFrame("Shape Outline");
  JPanel panel = new PanelB();
  panel.setPreferredSize(new Dimension(500,500));
  frame.getContentPane().add(panel);
  frame.pack();
  frame.setVisible(true);
  LinkedList points = new LinkedList();
  PanelB a = new PanelB();
  a.setLink(points);
}}I left a lot out of the code to make it easier and quicker to read. This is my next class that is called by this class.
public class PanelB extends JPanel {
public LinkedList q;
public void setLink(LinkedList p){
     q = p;
public void paint(Graphics g) {
     Graphics2D g2 = (Graphics2D)g;
     g2.setPaint(Color.red);
     Point trig = new Point(10,200), trigB = new Point (50, 300);
     double x1=trig.getX();
     double x2=trigB.getX();
     double y1=trig.getY();
     double y2=trigB.getY();
     super.paint(g);
     g2.draw(new Line2D.Double(x1, y1, x2, y2));
}This code draws a line. I would like bring my ListLinked to this subclass because I want to use the points I have stored in it to draw a picture.