public class TestClass{

    private MyButton button;

    public static void main(String[] args) {
        new TestClass().foo();
    }

    public void foo() {
        JFrame frame = new JFrame();
        JPanel panel = new JPanel();
        button = new MyButton("Button");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.add(panel);
        panel.add(button);

        frame.pack();
        frame.setVisible(true);
    }
}