Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;
import java.awt.geom.RoundRectangle2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class Main extends JComponent {
    private Image image;

    private int theta;

    public Main() {
        image = Toolkit.getDefaultToolkit().getImage("A.jpg");
        theta = 0;
        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent me) {
                theta = (theta + 15) % 360;
                repaint();
            }
        });
    }

    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        int cx = getSize().width / 2;
        int cy = getSize().height / 2;

        g2.translate(cx, cy);
        g2.rotate(theta * Math.PI / 180);

        Shape oldClip = g2.getClip();
        Shape e = new Ellipse2D.Float(-cx, -cy, cx * 2, cy * 2);
        g2.clip(e);

        Shape c = new Ellipse2D.Float(-cx, -cy, cx * 3 / 4, cy * 2);
        g2.setPaint(new GradientPaint(40, 40, Color.blue, 60, 50, Color.white, true));
        g2.fill(c);

        g2.setPaint(Color.yellow);
        g2.fillOval(cx / 4, 0, cx, cy);

        g2.setClip(oldClip);

        g2.setFont(new Font("Times New Roman", Font.PLAIN, 64));
        g2.setPaint(new GradientPaint(-cx, 0, Color.red, cx, 0, Color.black, false));
        g2.drawString("Hello, 2D!", -cx * 3 / 4, cy / 4);

        AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, (float) .75);
        g2.setComposite(ac);

        Shape r = new RoundRectangle2D.Float(0, -cy * 3 / 4, cx * 3 / 4, cy * 3 / 4, 20, 20);
        g2.setStroke(new BasicStroke(4));
        g2.setPaint(Color.magenta);
        g2.fill(r);
        g2.setPaint(Color.green);
        g2.draw(r);

        g2.drawImage(image, -cx / 2, -cy / 2, this);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();

        frame.add(new Main(), BorderLayout.CENTER);
        frame.setSize(300, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}