ColorFadingAnimation.java Source code

Introduction

Here is the source code for ColorFadingAnimation.java

Source

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class ColorFadingAnimation extends JPanel {
    private Rectangle2D rect = new Rectangle2D.Float(20f, 20f, 80f, 50f);

    private float alpha_rectangle = 1f;

    public ColorFadingAnimation() {
        new RectRunnable();
    }

    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setColor(new Color(50, 50, 50));
        RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        rh.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHints(rh);
        g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha_rectangle));
        g2d.fill(rect);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Color fading aniamtion");
        frame.add(new ColorFadingAnimation());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(250, 150);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    class RectRunnable implements Runnable {
        private Thread runner;

        public RectRunnable() {
            runner = new Thread(this);
            runner.start();
        }

        public void run() {
            while (alpha_rectangle >= 0) {
                repaint();
                alpha_rectangle += -0.01f;

                if (alpha_rectangle < 0) {
                    alpha_rectangle = 0;
                }
                try {
                    Thread.sleep(50);
                } catch (Exception e) {
                }
            }
        }
    }
}