Animations in Java

[poll262]

I am currently working on my final task and am making a game. I am trying to create an object to be used to animate a character but am having difficulty with drawing the image. Here is the code I have so far.

Java:

import java.awt.Image; public class Animation {         Image images [];         long delay;                 public Animation (Image images [], int length) {                 this.images = images;                 delay = images.length / length;         }                 public void playAnimation () {                 for (int i= 0; i < images.length; i++) {                         try {                                 //draw images[i]                                 Thread.sleep(delay);                         } catch (InterruptedException e) {                                 e.printStackTrace();                         }                 }         } }

I need to somehow tell my main program to draw the image from the array but I can't figure it out.

[poll262]

Anybody?

[Zren]

Is this for an applet (embedded on a web page) or as a standard application window?

[poll262]

It will be in an application window, not an applet.

[Zren]

http://docs.oracle.com/javase/tutorial/uiswing/index.html
http://stackoverflow.com/questions/299495/java-swing-how-to-add-an-image-to-a-jpanel

I'd suggest the second option on the stackoverflow link (http://stackoverflow.com/a/2706730).

To update the image to the next keyframe of the animation, just set the icon on the JLabel.

Edit: You need to create the window (JFrame) and add a JPanel into the JFrame. Then add a JLabel with an icon into the panel. The JPanel might be an unnecessary step. I forget.

[poll262]

But I want more control over the location of the animation and would like to use java's 2d graphics classes. I want to draw images like this:

http://docs.oracle.com/javase/tutorial/2d/images/drawimage.html

[Zren]

Ah. Well then make a new class that subclasses JPanel. Then overload it's paintComponent method.

http://docs.oracle.com/javase/1.5.0/docs/api/javax/swing/JComponent.html#paintComponent(java.awt.Graphics)

Make sure to call super.paintComponent(g).

[poll262]

I understand that already. The problem that I am having is getting my animation object to draw the image to the panel which would be in a different class.

[Zren]

Either pass all variables from the Game class into the Animation class (like the images) in the constructor/setters. OR pass the Game class instance into the Animation object. Then have it call the images.


Eg:

Java:

class Game {     GameCanvas canvas = new GameCanvas(this); } class GameCanvas extends JPanel {     Game game;     public GameCanvas(Game game) {         this.game = game;     }     public void paintComponent(Graphics g) {         game.draw(g);         // or g.drawImage(... game.image ...);     } }

[poll262]

I don't understand what passing the game class instance does. Could you explain?

edit: I would also like it so that the main class is drawing the images.