Designing Graphical Interfaces - Beginning Java Programming: The Object-Oriented Approach - page 477

The BorderLayout comes with two constructors. These are:

public BorderLayout();
public BorderLayout (int hgap, int vgap);

// hgap, vgap: horizontal/vertical gap between the components

Note that the BorderLayout is the default layout manager for the content pane of a windowed con-
tainer (e.g., for a JFrame ). You've already seen how it works in your first Try It Out for this chapter,
but look at another example here.

experimenting with the BorderLayout

try it out

In this Try It Out, you create a JFrame to see how the BorderLayout layout manager works.
1.

As always, feel free to create a new project in Eclipse when you want to. Create a class called
BorderLayoutFrame with the following content:
import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class BorderLayoutFrame {

public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("BorderLayout frame");

/* Since the default layout manager for bordered containers is
* already a BorderLayout, the following line is OPTIONAL here.
*/
frame.getContentPane().setLayout(new BorderLayout());

frame.getContentPane().add(new JButton("NORTH"), BorderLayout.NORTH);
// ... or BorderLayout.PAGE_START

frame.getContentPane().add(new JButton("WEST"), BorderLayout.WEST);
// ... or BorderLayout.LINE_START

frame.getContentPane().add(new JButton("EAST"), BorderLayout.EAST);
// ... or BorderLayout.LINE_END

frame.getContentPane().add(new JButton("SOUTH"), BorderLayout.SOUTH);
// ... or BorderLayout.PAGE_END

frame.getContentPane().add(new JButton("CENTER"), BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}

2.

Run the project from Eclipse. You should see the window in Figure 11-10.