Java Swing How to - Align components with GridBagLayout

Question

We would like to know how to align components with GridBagLayout.
Answer

import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
//from  w w w .j  av a2 s . c  o m
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Main {
  public Main() {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new MyPanel());
    frame.pack();
    frame.setMinimumSize(frame.getPreferredSize());
    frame.setVisible(true);
  }

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

class MyPanel extends JPanel {
  public MyPanel() {
    JTextField labelA = new JTextField("Your A component");
    JTextField labelB = new JTextField("Your B component");
    JTextField labelC = new JTextField("Your C component");
    JTextField labelD = new JTextField("Top Right D");

    JPanel north = new JPanel(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.anchor = GridBagConstraints.FIRST_LINE_END;
    gbc.weightx = 1;
    gbc.insets = new Insets(10, 10, 10, 10);
    north.add(labelD, gbc);

    JPanel south = new JPanel(new GridBagLayout());
    gbc.anchor = GridBagConstraints.CENTER;
    gbc.gridy = 0;
    south.add(labelA, gbc);
    gbc.gridy = 1;
    south.add(labelB, gbc);
    gbc.gridy = 2;
    south.add(labelC, gbc);

    setLayout(new BorderLayout());
    add(north, BorderLayout.NORTH);
    add(south, BorderLayout.CENTER);
  }
}