import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GridBag4 extends JPanel {
GridBagConstraints constraints = new GridBagConstraints();
public GridBag4() {
setLayout(new GridBagLayout());
constraints.fill = GridBagConstraints.BOTH;
constraints.weighty = 1.0;
int x, y; // for clarity
constraints.weightx = 0.1;
addGB(new JButton("one"), x = 0, y = 0);
constraints.weightx = 0.5;
addGB(new JButton("two"), ++x, y);
constraints.weightx = 1.0;
addGB(new JButton("three"), ++x, y);
}
void addGB(Component component, int x, int y) {
constraints.gridx = x;
constraints.gridy = y;
add(component, constraints);
}
public static void main(String[] args) {
JFrame frame = new JFrame("GridBag4");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 100);
frame.setLocation(200, 200);
frame.setContentPane(new GridBag4());
frame.setVisible(true);
}
}