if (panelBotonera == null) {
panelBotonera = new JPanel();
panelBotonera.setLayout(null);
panelBotonera.setBounds(new Rectangle(457, 312, 341, 48));
panelBotonera.setOpaque(false);
panelBotonera.setBorder(BorderFactory.createTitledBorder(new SoftBevelBorder(SoftBevelBorder.RAISED), "", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, new Font("TimesRoman", Font.BOLD, 18), Color.black));
botonEliminar = new JButton();
botonEliminar.setText("Eliminar");
botonEliminar.setBounds(new Rectangle(237, 15, 100, 20));