import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.BorderLayout;

class Simple00GUI {

	private static final String TITULO_FRAME = "Simple00GUI";
	private static final String TEXTO_BOTON = "Púlsame!";

	private void creaGUI() {
		JFrame.setDefaultLookAndFeelDecorated(true);
		JFrame frame = new JFrame(TITULO_FRAME);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JPanel contentPane = (JPanel) frame.getContentPane();
		JButton button = new JButton(TEXTO_BOTON);
		contentPane.add(button, BorderLayout.CENTER);
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String args[]) {
		Simple00GUI p = new Simple00GUI();
		p.creaGUI();
	}
}