reusable specific gui

[-]

when designing a GUI, should reusability be taken into account for the
class as well the methods?

e.g an internal frame with a display area and an input area.

1) no 'extends'

public class SampleIFrame {

private JComponent display;

private JComponent input;

private SampleIFrame() {
}

public static JComponent createWindow() {
display = createDisplay();
input = createInput();

...
...
}

public JComponent getDisplay() {
return display;
}

public JComponent getInput() {
return input;
}

protected JComponent createDisplay() {
return new JTextArea();
}

protected JComponent createInput() {
return new JTextField();
}
}


2) with 'extends'

public class SampleIFrame extends JInternalFrame {

private JComponent display;

private JComponent input;

private SampleIFrame() {
display = createDisplay();
input = createInput();

...
...
}
...
...
}


or if there are nicer ways to do it, please share it with me...