Add items to an array repaint problem

Hey, im having some problems with making a 2d canvas. I have made a canvas that adds images to it when i click. I want to store the x and y coordinates of each image i add into an array when they are added to the canvas.

The problem i am having is that if i resize the window and left click the code performs the add item to array hundreds of times because of the repaint, heres my code :

Code:

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public void mouseClicked(MouseEvent e)
        {
                if(this.contains(e.getX(),e.getY()))
                {
                // set last mouse click position
                last_X = e.getX();
                repaint();
               
              //add xposition to the array
              Integer xpos=new Integer(last_x);
              imageposx.add(xpos);
              //set image to draw as 1
              paintimage = 1;
                }
        }


        public void paintComponent(Graphics g)
        { 
                if (paintimage == 1)
                {
                        drawthis(g);
                }
        }

        public void drawthis(Graphics g)
        {
                g.setColor (Color.BLACK);
                g.fillRoundRect(last_X, last_Y, 200, 200, 2, 2);
        }

---

So im really just looking for a way to add the values to the array when i click but without it adding values on each repaint of the graphics context. Any help would be good :)

That's not really enough code for us to work from. Code you post should be in the form of an SSCCE.

I suggest you use print statements instead of adding items to an array, that way it's easier to see what you're talking about without reading through extra stuff.