[SOLVED] Double Buffering

[Zosden]

Can someone please help me make this code use double buffering.

Code:

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;


public class Window extends Applet implements Runnable 
{

	/**
	 * 
	 */
	private static final long serialVersionUID = -8255319694373975038L;
	
	private PictureGenerator myImageGenerator;
	private Image myImage;
	private Thread myThread;
	private BufferedImage bi;
	
	float[] scales = { 1f, 1f, 1f, 0.5f };
    float[] offsets = new float[4];
    RescaleOp rop;
    
    private float trans;

	
	public void init()
	{
		this.setSize(400, 300);
		setBackground(Color.WHITE);
		trans = 1;
		this.setupImage();
		this.start();
	}
	
	public void start(){
		myThread = new Thread(this);
		myThread.start();
	}

	public void stop()
	{
		myThread = null;
	}

	public void run()
	{
		while(true)
		{
			try {
				myThread.sleep(100);
				if(trans <= -1)
				{
					trans = 1;
				}
				trans -= .01;
				setOpacity(trans);
				this.update();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	private void setupImage()
	{
		try {
            BufferedImage img = ImageIO.read(new File("images.jpeg"));
            int w = img.getWidth(null);
            int h = img.getHeight(null);
            bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
            Graphics g = bi.getGraphics();
            g.drawImage(img, 0, 0, null);

        } catch (IOException e) {
            System.out.println("Image could not be read");
            System.exit(1);
        }
        setOpacity(trans);

	}
	
	private void setOpacity(float opacity) {
        scales[3] = opacity;
        rop = new RescaleOp(scales, offsets, null);
    }

	public void paint(Graphics g)
	{
		Graphics2D g2d = (Graphics2D)g;
		g2d.drawImage(bi, rop, 0, 0);
	}
	
	public void update()
	{
		this.repaint();
	}
}

[Zosden]

NVM found answer

Code:

import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;


public class Window extends Applet implements Runnable 
{

	/**
	 * 
	 */
	private static final long serialVersionUID = -8255319694373975038L;

	private static final float MAX_TRANS = 3;

	private static final float MIN_TRANS = -.5f;
	
	private PictureGenerator myImageGenerator;
	private Image myImage;
	private Thread myThread;
	private BufferedImage bi;
	
	float[] scales = { 1f, 1f, 1f, 0.5f };
    float[] offsets = new float[4];
    RescaleOp rop;
    
    private float trans;
    
    private Image dbImage;
    private Graphics dbg;

	
	public void init()
	{
		this.setSize(400, 300);
		setBackground(Color.WHITE);
		trans = MAX_TRANS;
		this.setupImage();
		this.start();
	}
	
	public void start(){
		myThread = new Thread(this);
		myThread.start();
	}

	public void stop()
	{
		myThread = null;
	}

	public void run()
	{
		while(true)
		{
			try {
				myThread.sleep(10);
				if(trans <= MIN_TRANS)
				{
					trans = MAX_TRANS;
				}
				trans -= .005;
				setOpacity(trans);
				this.repaint();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	private void setupImage()
	{
		try {
            BufferedImage img = ImageIO.read(new File("images.jpeg"));
            int w = img.getWidth(null);
            int h = img.getHeight(null);
            bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
            Graphics g = bi.getGraphics();
            g.drawImage(img, 0, 0, null);

        } catch (IOException e) {
            System.out.println("Image could not be read");
            System.exit(1);
        }
        setOpacity(trans);

	}
	
	private void setOpacity(float opacity) {
        scales[3] = opacity;
        rop = new RescaleOp(scales, offsets, null);
    }

	public void paint(Graphics g)
	{
		Graphics2D g2d = (Graphics2D)g;
		g2d.drawImage(bi, rop, 0, 0);
	}
	
	public void update(Graphics g)
	{
		if (dbImage == null)
		{

		      dbImage = createImage (this.getSize().width, this.getSize().height);
		      dbg = dbImage.getGraphics ();

		}

		// clear screen in background
		dbg.setColor (getBackground ());
		dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);

		// draw elements in background
		dbg.setColor (getForeground());
		paint (dbg);

		// draw image on the screen
		g.drawImage (dbImage, 0, 0, this);
	}
}