Java Swing How to - Create a layout using GridBagLayout

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Question

We would like to know how to create a layout using GridBagLayout.

Answer

import java.awt.BorderLayout;
import java.awt.GridLayout;
//w  w  w . ja v  a  2s . c o  m
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;

public class Main extends JFrame {
  private JPanel pan;

  public Main() {

    GridLayout g = new GridLayout(3, 3);
    pan = new JPanel(g);
    pan.add(new JButton("1"));
    pan.add(new JButton("2"));
    pan.add(new JButton("3"));
    pan.add(new JButton("4"));
    pan.add(new JButton("5"));
    pan.add(new JButton("6"));
    pan.add(new JButton("7"));
    pan.add(new JButton("8"));
    pan.add(new JButton("9"));
    JLabel l = new JLabel("grid layout");
    l.setHorizontalAlignment(SwingConstants.CENTER);

    setLayout(new BorderLayout());
    add(l, BorderLayout.NORTH);
    add(pan, BorderLayout.CENTER);
    setSize(1000, 500);
    setVisible(true);
  }

  public static void main(String args[]) {
    new Main();
  }

}

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