dissolvefiltertest.java

java对图片进行处理

import java.applet.Applet;
import java.awt.*;
import java.awt.image.*;
import java.net.URL;

public class DissolveFilterTest extends Applet {
    private Image   im, alpha;
    private int    	alphaValue;

    public void init() {
		loadImage();
		filterImage();
    }
    public void paint(Graphics g) {
		int imw = im.getWidth(this);

		g.drawImage(im,0,0,this);
		g.drawImage(alpha,imw,0,this);
    }
	private void loadImage() {
		try {
			URL url = getClass().getResource("tiger.gif");
			im = createImage((ImageProducer)url.getContent());
		}
		catch(Exception e) {
			e.printStackTrace();
		}

		MediaTracker mt = new MediaTracker(this);
		mt.addImage(im, 0);
		try {
			mt.waitForID(0);
		}
		catch(Exception e) {
			e.printStackTrace();
		}
	}
	private void filterImage() {
		alpha = createImage(new FilteredImageSource(
				im.getSource(), new DissolveFilter(50)));
	}
}