BallRoom.java Source code

Introduction

Here is the source code for BallRoom.java

Source

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

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

public class BallRoom {
    public static void main(String[] a) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(200, 300);
        PaintSurface canvas = new PaintSurface();

        ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(3);
        executor.scheduleAtFixedRate(canvas, 0L, 100L, TimeUnit.MILLISECONDS);

        f.getContentPane().add(canvas);
        f.setVisible(true);

    }
}

class PaintSurface extends JComponent implements Runnable {
    int i = 0;

    public void run() {
        repaint();
    }

    public void paint(Graphics g) {

        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        Shape ball = new Ellipse2D.Float(i++, i++, 5, 5);
        g2.setColor(Color.RED);
        g2.fill(ball);
    }
}