import javax.swing.*;

/**
 * @author Remi Forax
 */
public class HierarchySwing2 {

  public static void main(String[] args) {
    JButton button1=new JButton("button 1");
    JButton button2=new JButton("button 2");
    
    JPanel panel=new JPanel();
    panel.add(button1);
    panel.add(button2);
    
    JFrame frame=new JFrame("HelloSwing");
    frame.setContentPane(panel);
    frame.setSize(400,300);
    frame.show();
  }
}