Changing the Image quality

Question

I trying to change the image quality. Iam using the following program.
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageOutputStream;
public class QualityTest {
     public static void main(String[] args) throws IOException
          {     Timer t=new Timer();
               t.start();
               BufferedImage image = ImageIO.read(new File(args[0]));
               Iterator writers = ImageIO.getImageWritersBySuffix("jpeg");
               if (!writers.hasNext()) throw new IllegalStateException("No writers for jpeg?!");
               ImageWriter writer = (ImageWriter) writers.next();
               ImageWriteParam imageWriteParam = writer.getDefaultWriteParam();
               imageWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
               List thumbNails = null;
               IIOImage iioImage = new IIOImage(image, thumbNails, (IIOMetadata) null);
               write(writer, imageWriteParam, iioImage, "high_quality.jpeg", 0.75f);
               write(writer, imageWriteParam, iioImage, "low_quality.jpeg", 0.0f);
               write(writer, imageWriteParam, iioImage, "mid_quality.jpeg", 0.5f);
               t.stop();
               t.print("Writing Time");
               public static void write(ImageWriter writer, ImageWriteParam imageWriteParam, IIOImage iioImage, String filename, float compressionQuality) throws IOException
                    ImageOutputStream out = ImageIO.createImageOutputStream(new File(filename));
                    imageWriteParam.setCompressionQuality(compressionQuality);
                    writer.setOutput(out);
                    writer.write((IIOMetadata) null, iioImage, imageWriteParam);
                    out.flush(); out.close();
the size of the image after writing it on to the disk is huge. Iam not able to understand the reason. When u r compressing at lower qualities the size should reduce. Can any one help me

Answer 1

the size of the image after writing it on to the disk
is huge. Iam not able to understand the reason. When u
r compressing at lower qualities the size should
reduce. Can any one help meI assume you are referring to the size of the jpeg files created. I tried running it on an image from James Gosling's home page:
http://java.sun.com/people/jag/JamesBarbGeoff.html
The original is 63K. The code here creates files of sizes 9K, 37K and 65K -- all reasonably sized... Where is the problem?