Instead of either of these options, we can create the applet with a
BorderLayout
and put the TextArea
in its
center. Then we create a Panel
, set the
LayoutManager
of the Panel
to
FlowLayout
, add the button to the panel, and then add the
panel to the south part of the applet. Indeed that's exactly what
was done to produce the above applet. Here's the code:
import java.applet.*;
import java.awt.*;
public class PanelExample extends Applet {
public void init() {
this.setLayout(new BorderLayout());
this.add(BorderLayout.CENTER, new TextArea());
Panel p = new Panel();
p.setLayout(new FlowLayout(FlowLayout.CENTER));
p.add(new Button("OK"));
this.add(BorderLayout.SOUTH, p);
}
}
It's important in this example to distinguish between adding to the
applet (add(...)
or this.add(...)
) and
adding to the panel (p.add(...)
).
On the other hand it doesn't matter whether you add the panel to the applet and then add the button to the panel, or first add the button to the panel and then add the panel to the applet.
Another common use for a panel is to align a series of
checkboxes in a GridLayout
with one column.