import java.awt.*;
import javax.swing.*;

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

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