Java Swing | Creating Custom Message Dialogs

// Java Program to create a simple JWindow
// and add label and button to it.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class message implements ActionListener {

    // window
    JWindow w;

    // constructor
    message()
    {
        // create a window
        w = new JWindow();

        // create a label
        JLabel l = new JLabel("This  is a message dialog");

        // create a new button
        JButton b = new JButton("OK");

        // add action listener
        b.addActionListener(this);

        // create a panel
        JPanel p = new JPanel();

        // add contents to panel
        p.add(l);
        p.add(b);

        w.add(p);

        w.setSize(200, 100);
        w.setLocation(300, 300);

        w.show();
    }

    // if button is pressed
    public void actionPerformed(ActionEvent evt)
    {
        w.setVisible(false);
    }

    // main class
    public static void main(String args[])
    {
        // create aobject
        message m = new message();
    }
}

// Java Program to create a message window,
// and shape the window and add background color to it
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class message1 implements ActionListener {
    // window
    JWindow w;

    // constructor
    message1()
    {
        // create a window
        w = new JWindow();

        // set background of window transparent
        w.setBackground(new Color(0, 0, 0, 0));

        // create a label
        JLabel l = new JLabel("This  is a message dialog");

        // create a new button
        JButton b = new JButton("OK");

        // add action listener
        b.addActionListener(this);

        try {
            // set windows look and feel
            UIManager.setLookAndFeel(UIManager.
                             getSystemLookAndFeelClassName());
        }
        catch (Exception e) {
        }

        // create a panel
        JPanel p = new JPanel() {
            public void paintComponent(Graphics g)
            {

                g.setColor(new Color(100, 100, 240));
                g.fillRoundRect(0, 0, 200, 100, 20, 20);

                g.setColor(new Color(10, 10, 255));
                g.drawRoundRect(0, 0, 200, 100, 20, 20);
            }
        };

        // create a font
        Font f = new Font("BOLD", 1, 14);

        l.setFont(f);

        // add contents to panel
        p.add(l);
        p.add(b);

        w.add(p);

        w.setSize(200, 100);
        w.setLocation(300, 300);

        w.show();
    }

    // if button is pressed
    public void actionPerformed(ActionEvent evt)
    {
        w.setVisible(false);
    }

    // main class
    public static void main(String args[])
    {
        // create aobject
        message1 m = new message1();
    }
}

// Java Program to create a message window, shape the window
// add background color to it and also add
// glossy appearance to the window by applying per pixel translucency
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class message2 implements ActionListener {
    // window
    JWindow w;

    // constructor
    message2()
    {
        // create a window
        w = new JWindow();

        // set background of window transparent
        w.setBackground(new Color(0, 0, 0, 0));

        // create a label
        JLabel l = new JLabel("This  is a message dialog");

        // create a new button
        JButton b = new JButton("OK");

        // add action listener
        b.addActionListener(this);

        try {
            // set windows look and feel
            UIManager.setLookAndFeel(UIManager
                         .getSystemLookAndFeelClassName());
        }
        catch (Exception e) {
        }

        // create a panel
        JPanel p = new JPanel() {
            public void paintComponent(Graphics g)
            {

                g.setColor(new Color(100, 100, 240));
                g.fillRoundRect(0, 0, 200, 100, 20, 20);

                g.setColor(new Color(10, 10, 255));
                g.drawRoundRect(0, 0, 200, 100, 20, 20);

                // create a glossy appearance
                for (int i = 0; i < 100; i++) {
                    g.setColor(new Color(255, 255, 255, i));
                    g.drawLine(0, i, 200, i);
                }
            }
        };

        // create a font
        Font f = new Font("BOLD", 1, 14);

        l.setFont(f);

        // add contents to panel
        p.add(l);
        p.add(b);

        w.add(p);

        w.setSize(200, 100);
        w.setLocation(300, 300);

        w.show();
    }

    // if button is pressed
    public void actionPerformed(ActionEvent evt)
    {
        w.setVisible(false);
    }

    // main class
    public static void main(String args[])
    {
        // create aobject
        message2 m = new message2();
    }
}