Java GridBagConstraints(int gridx, int gridy, int gridwidth, int gridheight, double weightx, double weighty, int anchor, int fill, Insets insets, int ipadx, int ipady) Constructor

public GridBagConstraints(int gridx,     int gridy,     int gridwidth,     int gridheight,     double weightx,     double weighty,     int anchor,     int fill,     Insets insets,     int ipadx,     int ipady)

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import java.awt.Component;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

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

public class Main {

  public static void main(String[] a) {
    final JFrame frame = new JFrame("GridBagLayout");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new GridBagLayout());
    JButton button;

    button = new JButton("One");
    addComponent(frame, button, 0, 0, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.NONE);
    button = new JButton("Two");
    addComponent(frame, button, 1, 0, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.NONE);

    button = new JButton("Three");
    addComponent(frame, button, 0, 1, 2, 1, GridBagConstraints.CENTER, GridBagConstraints.NONE);

    button = new JButton("Four");
    addComponent(frame, button, 0, 2, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.NONE);
    frame.setSize(500, 200);
    frame.setVisible(true);
  }

  private static void addComponent(Container container, Component component, int gridx, int gridy,
      int gridwidth, int gridheight, int anchor, int fill) {
    Insets insets = new Insets(0,0,0,0);
    GridBagConstraints gbc = new GridBagConstraints(gridx, gridy, gridwidth, gridheight, 1.0, 1.0,
        anchor, fill, insets, 0, 0);
    container.add(component, gbc);
  }
}