THREAD_GraphicUpdateApp.java

// MUESTRA UN MUNIEQUITO BRINCANDO -USO DE IMAGENES-
import java.awt.*;
import java.awt.event.*;

public class GraphicUpdateApp extends Frame implements Runnable
{
	Thread animation;
	int frameDelay = 200;
	Image frames[];
	int numFrames;
	int currentFrame = 0;
	long lastDisplay = 0;
	boolean fullDisplay = false;
	MediaTracker tracker;
	int screenWidth = 400;
	int screenHeight = 400;

	public static void main(String args[]) { GraphicUpdateApp app = new GraphicUpdateApp(); }

	public GraphicUpdateApp()
	{
		super("Updated Graphic Animation");
		setup();
		pack();
		setSize(screenWidth,screenHeight);
		addWindowListener(new WindowEventHandler());
		show();
		animation = new Thread(this);
		animation.start();
	}

	void setup()
	{
		setupMenuBar();
		setFont(new Font("default",Font.BOLD,18));
		Toolkit toolkit = getToolkit();
		frames = new Image[4];
		frames[0] = toolkit.getImage("stickman1.gif");
		frames[1] = toolkit.getImage("stickman2.gif");
		frames[2] = toolkit.getImage("stickman3.gif");
		frames[3] = toolkit.getImage("stickman4.gif");
		numFrames = frames.length;
		tracker = new MediaTracker(this);

		for(int i=0;i<numFrames;++i) tracker.addImage(frames[i],i);
	}

	void setupMenuBar()
	{
		MenuBar menuBar = new MenuBar();
		Menu fileMenu = new Menu("File");
		MenuItem fileExit = new MenuItem("Exit");
		fileExit.addActionListener(new MenuItemHandler()); 
		fileMenu.add(fileExit);
		menuBar.add(fileMenu);
		setMenuBar(menuBar);
	}

	public void paint(Graphics g)
	{
		if(allLoaded()) g.drawImage(frames[currentFrame],125,80,this);
		else
		{
			String stars = "*";
			for(int i=0;i<currentFrame;++i) stars += "*";
			g.drawString(stars,60,60);
		}
	}

	boolean allLoaded()
	{
		for(int i=0;i<numFrames;++i)
			if(tracker.statusID(i,true) != MediaTracker.COMPLETE) return false;
		return true;
	}

	public void run()
	{
		do
		{
			long time = System.currentTimeMillis();
			if(time - lastDisplay > frameDelay)
			{
				if(allLoaded())
				{
					if(fullDisplay) repaint (115,160,160,90);
					else
					{
						fullDisplay = true;
						repaint();
					}
				}
				else repaint();
				try { Thread.sleep(frameDelay); } catch(InterruptedException ex) { }
				++currentFrame;
				currentFrame %= numFrames;
				lastDisplay = time;
			}
		} while (true);
	}

	class MenuItemHandler implements ActionListener, ItemListener
	{
		public void actionPerformed(ActionEvent ev)
		{
			String s=ev.getActionCommand();
			if(s=="Exit") System.exit(0);
		}
		public void itemStateChanged(ItemEvent e) { }
	}

	class WindowEventHandler extends WindowAdapter { public void windowClosing(WindowEvent e) { System.exit(0); } }
}