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October 27, 2023 01:54
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An Example of the Grid Bag Layout in Java
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/* Modified from Listing 10-1 in | |
The Definitive Guide to Java Swing | |
by John Zukowski. | |
*/ | |
import java.awt.*; | |
import javax.swing.*; | |
public class GridBagLayoutExample { | |
private static final Insets insets = new Insets(0, 0, 0, 0); | |
private static final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); | |
private static final int width = 500; | |
private static final int height = 200; | |
public static void main(final String[] args) { | |
Runnable runner = () -> { | |
final JFrame frame = new JFrame("GridBagLayout"); | |
frame.setLocation( | |
(int) screenSize.getWidth() / 2 - width / 2, (int) screenSize.getHeight() / 2 - height / 2); | |
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); | |
frame.setLayout(new GridBagLayout()); | |
JButton button; | |
// Row One - Three Buttons | |
button = new JButton("One"); | |
addComponent(frame, button, 0, 0, 1, 1); | |
button = new JButton("Two"); | |
addComponent(frame, button, 1, 0, 1, 1); | |
button = new JButton("Three"); | |
addComponent(frame, button, 2, 0, 1, 1); | |
// Row Two - Two Buttons, Five will consume two rows. | |
button = new JButton("Four"); | |
addComponent(frame, button, 0, 1, 2, 1); | |
button = new JButton("Five"); | |
addComponent(frame, button, 2, 1, 1, 2); | |
// Row Three - Two Buttons | |
button = new JButton("Six"); | |
addComponent(frame, button, 0, 2, 1, 1); | |
button = new JButton("Seven"); | |
addComponent(frame, button, 1, 2, 1, 1); | |
frame.setSize(width, height); | |
frame.setVisible(true); | |
}; | |
EventQueue.invokeLater(runner); | |
} | |
private static void addComponent(Container container, Component component, | |
int gridx, int gridy, int gridwidth, int gridheight) { | |
GridBagConstraints gbc = | |
new GridBagConstraints(gridx, gridy, gridwidth, gridheight, 1.0, 1.0, | |
GridBagConstraints.CENTER, GridBagConstraints.BOTH, insets, 0, 0); | |
container.add(component, gbc); | |
} | |
} |
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