//file: GridBag5.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GridBag5 extends JPanel {
  GridBagConstraints constraints = new GridBagConstraints(  );

  public GridBag5(  ) {
    setLayout(new GridBagLayout(  ));
    int x, y;  // for clarity
    addGB(new JButton("North"),  x = 1, y = 0);
    constraints.ipadx = 25;  // add padding
    constraints.ipady = 25;
    addGB(new JButton("West"),   x = 0, y = 1);
    constraints.ipadx = 0;   // remove padding
    constraints.ipady = 0;
    addGB(new JButton("Center"), x = 1, y = 1);
    addGB(new JButton("East"),   x = 2, y = 1);
    addGB(new JButton("South"),  x = 1, y = 2);
  }

  void addGB(Component component, int x, int y) {
    constraints.gridx = x;
    constraints.gridy = y;
    add(component, constraints);
  }

  public static void main(String[] args) {
    JFrame f = new JFrame("GridBag5");
    f.addWindowListener(new WindowAdapter(  ) {
      public void windowClosing(WindowEvent e) { System.exit(0); }
    });
    f.setSize(250, 250);
    f.setLocation(200, 200);
    f.setContentPane(new GridBag5(  ));
    f.setVisible(true);
  }
}