Simple Java Contact Form

The following Java code defines a simple GUI application using Swing. It creates a form with text fields for name and email, a text area for messages, and actions buttons for OK and Cancel operations. Additionally, there is a button to change the background color of the form.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Form extends JFrame {
  private JPanel bottom, top, centre;
  private JButton b1, b2, OK;
  private JLabel n, e, m;
  private Color color = Color.black;
  private String s1, s2, s3, s4 = "", s5;
  TextField screen = new TextField(20);
  TextField scr = new TextField(20);
  TextArea a = new TextArea(6, 20);

  public Form()

  {
    super("Form");

    Container c = new Container();
    c = getContentPane();

    bottom = new JPanel();

    bottom.setBorder(BorderFactory.createEtchedBorder(Color.cyan, Color.blue));

    JButton b1 = new JButton("OK");
    JButton b2 = new JButton("Cancel");
    bottom.add(b1);

    bottom.add(b2);

    c.add(bottom, BorderLayout.SOUTH);

    top = new JPanel();
    n = new JLabel("NAME   ");
    e = new JLabel("EMAIL ");
    m = new JLabel("MESS");

    top.setLayout(new FlowLayout(FlowLayout.LEFT, 200, 50));

    top.add(n);
    top.add(scr);
    top.add(e);
    top.add(screen);
    top.add(m);
    top.add(a);
    c.add(top, BorderLayout.CENTER);
    top.setBorder(BorderFactory.createEtchedBorder(Color.blue, Color.green));

    centre = new JPanel();
    c.add(centre, BorderLayout.NORTH);
    centre.setBorder(BorderFactory.createEtchedBorder(Color.magenta, Color.pink));

    Button b3 = new Button("CHANGE COL");
    centre.add(b3);
    b3.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        Container c = getContentPane();
        color = JColorChooser.showDialog(Form.this, "Choose a color", color);
        if (color == null)
          color = Color.black;
        centre.setBackground(color);
        centre.repaint();
      }
    });

    b1.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        s1 = "The name is: " + " " + scr.getText();
        s1 += "\nEmail Addres is: " + " " + screen.getText();
        s1 += "\nMessage is: " + a.getText();
        s1 += "\nBackground Color is: " + color.toString();
        JOptionPane.showMessageDialog(null, s1);

      }
    });

    b2.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {

        dispose();
        System.exit(0);

      }
    });

    setSize(800, 500);
    setVisible(true);
  }

  public static void main(String args[]) {
    Form app = new Form();

    app.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }
}

Once you run the code you will see the following Java Form.