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How to create Animation
Posted on: December 15, 2008 at 12:00 AM

This section illustrates you how to create Animation. We are proving you an example defining a static variable DELAY of integer type.

How to create Animation

This section illustrates you how to create Animation. We are proving you an example defining a static variable DELAY of integer type. The object of Insets class is provides the representation of the borders i.e. left, right, top, bottom. the object of Timer class act as a thread which executes all the timer's tasks, sequentially.

The TimerTask class performs a task which can be scheduled for one-time or repeated execution by a Timer class. The method timer.schedule(timerTask, 0, DELAY) schedules the specified task for repeated fixed-delay execution.

The class Color defines an array of colors. The method fillRect() fills the rectangle with the colors showing animation.

Here is the code of CreateAnimation.java


import java.awt.*;

import java.util.Timer;

import java.util.TimerTask;

import javax.swing.JFrame;



public class CreateAnimation extends JFrame {

private static int DELAY = 90;

Insets insets;



  Color colors[] = { Color.PINK, Color.YELLOW, Color.GREEN, Color.RED,

  Color.BLUE, Color.CYAN };



  public void paint(Graphics graphics) {

  super.paint(graphics);

  if (insets == null) {

  insets = getInsets();

  }

  int steps=colors.length;

  int x = insets.left;

  int y = insets.top;

  int width = getWidth() - insets.left - insets.right;

  int height = getHeight() - insets.top - insets.bottom;

  

  synchronized (colors) {

  for (int i = 0; i < steps; i++) {

  graphics.setColor(colors[i]);

  graphics.fillRect(x, y, width, height);

  }

  }

  }

  public void go() {

  TimerTask timerTask = new TimerTask() {

  public void run() {

  Color color = colors[0];

  synchronized (colors) {

  System.arraycopy(colors, 1, colors, 0, colors.length - 1);

  colors[colors.length - 1] = color;

  }

  repaint();

  }

  };

  Timer timer = new Timer();

  timer.schedule(timerTask, 0, DELAY);

  }

 public static void main(String args[]) {

  CreateAnimation animation = new CreateAnimation();

  animation.setSize(250, 200);

  animation.show();

  animation.go();

  }

}

Output will be displayed as:

Download Source Code

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