Java by API/javax.imageio.event/IIOReadProgressListener

implements IIOReadProgressListener

  

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriter;
import javax.imageio.event.IIOReadProgressListener;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
public class Main{
  static public void main(String args[]) throws Exception {
    FileInputStream fin = new FileInputStream("a.gif");
    Iterator readers = ImageIO.getImageReadersBySuffix("GIF");
    ImageReader imageReader = (ImageReader) readers.next();
    ImageInputStream iis = ImageIO.createImageInputStream(fin);
    imageReader.setInput(iis, false);
    imageReader.addIIOReadProgressListener(new IIOReadProgressListener() {
      public void imageComplete(ImageReader source) {
        System.out.println("image complete " + source);
      }
      public void imageProgress(ImageReader source, float percentageDone) {
        System.out.println("image progress " + source + ": " + percentageDone + "%");
      }
      public void imageStarted(ImageReader source, int imageIndex) {
        System.out.println("image #" + imageIndex + " started " + source);
      }
      public void readAborted(ImageReader source) {
        System.out.println("read aborted " + source);
      }
      public void sequenceComplete(ImageReader source) {
        System.out.println("sequence complete " + source);
      }
      public void sequenceStarted(ImageReader source, int minIndex) {
        System.out.println("sequence started " + source + ": " + minIndex);
      }
      public void thumbnailComplete(ImageReader source) {
        System.out.println("thumbnail complete " + source);
      }
      public void thumbnailProgress(ImageReader source, float percentageDone) {
        System.out.println("thumbnail started " + source + ": " + percentageDone + "%");
      }
      public void thumbnailStarted(ImageReader source, int imageIndex, int thumbnailIndex) {
        System.out.println("thumbnail progress " + source + ", " + thumbnailIndex + " of "
            + imageIndex);
      }
    });
    BufferedImage image = imageReader.read(0);
    Iterator imageWriters = ImageIO.getImageWritersBySuffix("JPG");
    ImageWriter imageWriter = (ImageWriter) imageWriters.next();
    File file = new File("b.JPG");
    ImageOutputStream ios = ImageIO.createImageOutputStream(file);
    imageWriter.setOutput(ios);
    imageWriter.write(image);
  }
}