Multiple Circle objects on JPanel

Okay so I am creating a program where the user can click anywhere on a JPanel and a circle will appear. I can run the program with no errors however no circles are appearing when I click on the JPanel. I believe my paint components and draw methods are a little messy.

Main class:

public class Soap extends JFrame  {
	private JButton setSize = new JButton("SET RADIUS");
	private JButton green = new JButton("GREEN");
	private JButton red = new JButton("RED");
	private JLabel info = new JLabel("New Radius: ");
	private JTextField newR = new JTextField(8);
	public ArrayList<MakeBubbles> bub = new ArrayList<MakeBubbles>();
	private JPanel canvas = new JPanel();
	
	Soap(){
		setLayout(new BorderLayout());
		JPanel main = new JPanel(new FlowLayout(FlowLayout.CENTER));
		main.add(green);
		main.add(red);
		main.add(info);
		main.add(newR);
		main.add(setSize);
		add(main, BorderLayout.SOUTH);
		canvas.setBackground(Color.WHITE);
		add(canvas, BorderLayout.CENTER);
		canvas.addMouseListener(clicker);
	}
	
	protected void paintComponent(Graphics g){
		super.paintComponents(g);
		for (MakeBubbles mb : bub){
			mb.draw(g);
		}
	}
	
	MouseListener clicker = new MouseAdapter(){
		public void mouseClicked(MouseEvent e){
			MakeBubbles b = new MakeBubbles((int)e.getX(), (int)e.getY(), 79, Color.CYAN);
			bub.add(B)/>;
			repaint();
		}
	};
	
	public static void main(String[] args){
		Soap s1 = new Soap();
		s1.setVisible(true);
		s1.setSize(500,300);
		s1.setResizable(true);
		s1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

Bubble Class:

public class MakeBubbles  {
	int x = 0, y = 0, radius = 30;
	Color c = Color.CYAN;
	
	public MakeBubbles(int x, int y, int radius, Color c){
		this.x = x;
		this.y = y;
		this.radius = radius;
		this.c = c;
	}
	public int getX(){
		return this.x;
	}
	public int getY(){
		return this.y;
	}
	
	public void setRadius(int newR){
		this.radius = newR;
	}
	public int getRadius(){
		return this.radius;
	}
	public Color getColor(){
		return this.c;
	}
	public void draw(Graphics g){
		Graphics2D g2 = (Graphics2D) g;
		g2.setColor(c);
		g2.fillOval(x,y,radius,radius);
	}
}