gamemedia.java

本代码为java编写的泡泡龙游戏

import java.io.*;
import java.awt.*;
import java.applet.*;

public class GameMedia
{
	private MediaTracker mediaTracker;
	
	private GameApplet gameApplet;
	
	public GameMedia(GameApplet applet)
	{
		this.gameApplet = applet;
		this.mediaTracker = new MediaTracker(applet);
	}
	
	public byte[] loadData(String filename)
	{
		byte[] data = (byte[])gameApplet.getGameContext().getObject(filename);
		
		if (data != null)
		{
			return data;
		}
		
		try
		{
			InputStream in = gameApplet.getClass().getResourceAsStream(filename);
			
			data = new byte[in.available()];
			
			for (int i=0 ; i<data.length ; i++)
			{
				data[i] = (byte)in.read();
			}
			
			gameApplet.getGameContext().addObject(filename, data);
		}
		catch(Exception e)
		{
			System.err.println("Data File ["+filename+"] not found");
		}
		
		return data;
	}
	
	public Image loadImage(String filename)
	{
		Image img = (Image)gameApplet.getGameContext().getObject(filename);
	
		if (img != null)
		{
			return img;
		}
	
		try
		{
			InputStream in = gameApplet.getClass().getResourceAsStream(filename);
		
			byte[] buffer = new byte[in.available()];
						
			for (int i=0 ; i<buffer.length ; i++)
			{
				buffer[i] = (byte)in.read();
			}
			
			img = Toolkit.getDefaultToolkit().createImage(buffer);
			
			gameApplet.getGameContext().addObject(filename, img);
			
			mediaTracker.addImage(img, 0);
			mediaTracker.waitForID(0);
		}
		catch(Exception e)
		{
			System.err.println("Image File ["+filename+"] not found");
		}
		
		return img;
	}	
	
	public AudioClip loadAudioClip(String filename)
	{
		AudioClip clip = (AudioClip)gameApplet.getGameContext().getObject(filename);
						
		if (clip != null)
		{
			return clip;
		}
						
		clip = gameApplet.getAudioClip(gameApplet.getCodeBase(), filename);
		gameApplet.getGameContext().addObject(filename, clip);
		
		if (clip == null)
		{
			System.err.println("Audio File ["+filename+"] not found");
		}
		
		return clip;
	}
}