URGENT!! How to avoid paint all the components?

Question

In the following code sample, when you move the mouse, the top-level JPanel (with the name p) repaints itself with a red circle. The strange thing is that also the 4 JButtons repaint themselves!! (this is shown by the System.out). If the container of the 4 JButtons and the "p" had too many components, then the repaint of "p" gets very slow!! If i delete the line "super.paintComponent(g)" in the class "Myb", then the JButtons do not show correctly.
How can i avoid that the 4 JButtons do not repaint themselves all the time?
import javax.swing.*;
import java.awt.*;
public class Fr extends javax.swing.JFrame {
    private javax.swing.JPanel p;
    private Ap ap1;
    private Myb b4;
    private Myb b3;
    private Myb b2;
    private Myb b1;
    public Fr() {
        p = new javax.swing.JPanel();
        ap1 = new Ap();
        b1 = new Myb();
        b2 = new Myb();
        b3 = new Myb();
        b4 = new Myb();
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                System.exit(0);
        p.setLayout(null);
        p.setBackground(new java.awt.Color(153, 153, 0));
        p.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
            public void mouseMoved(java.awt.event.MouseEvent evt) {
                ap1.repaintWith(SwingUtilities.convertPoint(p,evt.getPoint(),ap1));
        ap1.setFont(new java.awt.Font("Dialog", 0, 11));
        ap1.setOpaque(false);
        p.add(ap1);
        ap1.setBounds(-10, -40, 500, 500);
        b1.setText("b1");
        p.add(b1);
        b1.setBounds(0, 0, 150, 150);
        b2.setText("b2");
        p.add(b2);
        b2.setBounds(0, 150, 150, 150);
        b3.setText("b3");
        p.add(b3);
        b3.setBounds(150, 0, 150, 150);
        b4.setText("b4");
        p.add(b4);
        b4.setBounds(150, 150, 150, 150);
        getContentPane().add(p, java.awt.BorderLayout.CENTER);
        pack();
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setSize(new java.awt.Dimension(500, 500));
        setLocation((screenSize.width-500)/2,(screenSize.height-500)/2);
    public static void main(String args[]) {
        new Fr().show();
class Ap extends JPanel
    private Point p;
    public Ap(){
        super();
        p = new Point(10,10);
    public void repaintWith(Point p){
        this.p = p;
        repaint();
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.red);
        g.fillOval(p.x-5,p.y-5,10,10);
class Myb extends JButton
    int x = 0;
    public Myb() {
        super();
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        System.out.println(getText()+"-->"+(x++));
}

Answer 1

I did that, but still nothing!
I inserted these lines!
        JPanel subp = new javax.swing.JPanel();
        subp.setBorder(new javax.swing.border.LineBorder(Color.blue, 2));
        subp.setOpaque(false);
        p.add(subp);
        subp.setBounds(200, 0, 200, 200);
        ap1.setOpaque(false);
        subp.add(ap1);
        ap1.setBounds(200, 0, 200, 200);