import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;

import java.awt.Toolkit;
import java.awt.event.KeyListener;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JWindow;

public class XWin extends JWindow {


    public XWin() {
        super();
        Dimension sc = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension fs = new Dimension(420, 360);//w,h
        setSize(fs); //width, height
        setVisible(true);
        setLocation((sc.width - fs.width) / 2, (sc.height - fs.height) / 2);
    }

    public static void main(String[] args) {
        XWin xWin = new XWin();
        xWin.addMouseListener(new MouseListener() {
                public void mouseClicked(MouseEvent e) {
                    System.exit(0);
                }

                public void mousePressed(MouseEvent e) {
                    System.out.println("mousePressed");
                }

                public void mouseReleased(MouseEvent e) {
                    System.out.println("mouseReleased");
                }

                public void mouseEntered(MouseEvent e) {
                    System.out.println("mouseEntered");
                }

                public void mouseExited(MouseEvent e) {
                    System.out.println("HI!");
                }
            });
    }

    @Override
    public void paint(Graphics graphics) {
        Graphics2D g = (Graphics2D)graphics;
        int w = getWidth();
        int h = getHeight(); // Red, Green, Blue;
        Color color1 = new Color(255, 0, 255);
        Color color2 = new Color(205, 0, 205);
        GradientPaint gp = new GradientPaint(0, 0, color1, 0, h / 2, color2);
        GradientPaint gp2 = new GradientPaint(0, h / 2, color2, 0, h, color1);
        g.setPaint(gp);
        g.fillRect(0, 0, w, h / 2);
        g.setPaint(gp2);
        g.fillRect(0, h / 2, w, h);

        g.setColor(Color.BLACK);
        String string = "Hello";
        Font font = new Font("Andalus", Font.PLAIN, 48);
        FontMetrics fm = this.getFontMetrics(font);
        g.drawLine(0, 0, w, 0); //x:y / w:h
        g.drawLine(0,0,0, h);
        g.drawLine(0, h - 1, w, h - 1);
        g.drawLine(w - 1, 1, w - 1, h);
        g.setColor(new Color(255, 255, 25));
        g.setFont(font);
        g.drawString(string, ((w - fm.stringWidth(string)) / 2), ((h + fm.getHeight()) / 2) - fm.getDescent());
    }

}