保存鼠标拖曳的所有x和y点

Question

I have this where I drag my mouse and it basically paints in the shape of small ovals or rectangles, but I'm unsure of how to make it save all of the points to repaint them when the window is resized... I know it has something to do with paintComponent() but not quite sure how to go about doing it, any help would be greatly appreciated

Here is the bit that does the drawing

public void mouseDragged(MouseEvent evt){
        Point pt = evt.getPoint();
        x = pt.x;
        y = pt.y;
        Graphics g = getGraphics();
        g.setColor(color);
        if(Shape == "Oval"){
            g.drawOval(x, y, 10, 10);
            }
        if(Shape == "Rectangle"){
            g.drawRect(x, y, 10, 10);
            } 
    }

public void paintComponent(Graphics g){
    super.paintComponent(g);

    }

Answer 1

You can create a list (external to your method) that stores all the points.

List<Point> list = new LinkedList<>() ;
public void mouseDragged(MouseEvent evt){
    Point pt = evt.getPoint();
    list.add(pt) ;