Convert large picture files to small thumbnail files in Java

Thumbnail | Transform use Java to convert large picture files into small thumbnail files, requiring the use of JDK1.4,
You can change this program code to JavaBean for use in a Web environment.
The converted small thumbnail effect is good!

Import Javax.imageio.ImageIO;
Import javax.imageio.IIOException;
Import Java.awt.image.BufferedImage;
Import Java.awt.Image;
Import Java.io.File;
Import java.awt.image.AffineTransformOp;
Import Java.awt.geom.AffineTransform;

public class Imgtest {

public static void Main (String argv[]) {
try {
File fi = new file ("C:/image2.jpg"); Large image file
File fo = new file ("C:/imgtest.jpg"); The small diagram file that will be converted
int NW = 100;
AffineTransform transform = new AffineTransform ();
BufferedImage bis = imageio.read (FI);
int w = bis.getwidth ();
int h = bis.getheight ();
Double scale = (double) w/h;
int nh = (nw*h)/w;
Double SX = (double) nw/w;
Double sy = (double) nh/h;
Transform.settoscale (Sx,sy);
System.out.println (w + "" +h);
Affinetransformop ato = new Affinetransformop (transform,null);
BufferedImage bid = new BufferedImage (NW,NH,BUFFEREDIMAGE.TYPE_3BYTE_BGR);
Ato.filter (Bis,bid);
Imageio.write (BID, "jpeg", FO);
catch (Exception e) {
E.printstacktrace ();
}
}

}