CustomWindow_JavaTutorial.java

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

/**
 *
 *@author Vincent
 */
public class CustomWindow_JavaTutorial {

    static Point compCoords;

    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        JFrame window = new JFrame("Draggable Component: Java Tutorial");
        final JPanel topPanel = new JPanel((LayoutManager) new FlowLayout(FlowLayout.RIGHT));
        final JButton minimize = new JButton("-");
        final JButton exit = new JButton("X");
        exit.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        minimize.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                window.setState(JFrame.ICONIFIED);
            }
        });
        compCoords = null;
        topPanel.addMouseListener(new MouseListener() {
            public void mouseReleased(MouseEvent e) {
                compCoords = null;
            }

            public void mousePressed(MouseEvent e) {
                compCoords = e.getPoint();
            }

            public void mouseExited(MouseEvent e) {
            }

            public void mouseEntered(MouseEvent e) {
            }

            public void mouseClicked(MouseEvent e) {
            }
        });
        topPanel.addMouseMotionListener(new MouseMotionListener() {
            public void mouseMoved(MouseEvent e) {
            }

            public void mouseDragged(MouseEvent e) {
                Point currCoords = e.getLocationOnScreen();
                window.setLocation(currCoords.x - compCoords.x, currCoords.y - compCoords.y);
            }
        });
        topPanel.add(minimize);
        topPanel.add(exit);
        window.add(BorderLayout.NORTH, topPanel);
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(500, 500);
        window.setLocationRelativeTo(null);
        window.setUndecorated(true);
        window.setVisible(true);
    }
}