import javax.swing.*; 

class Two {
  public static void main(String[] args) {
    JFrame frame = new JFrame(); 

    JButton button = new JButton("Click me!"); 
    JLabel label = new JLabel("Hello, World!"); 
 
    JPanel panel = new JPanel();  
    panel.add(button); 
    panel.add(label); 

    frame.add(panel); 

    frame.setSize(300, 100); 
    frame.setTitle("An empty frame"); 
    frame.setDefaultCloseOperation(3); // better: JFrame.EXIT_ON_CLOSE
    frame.setVisible(true); 
  }
}