| |
| Show Image with ImageReader |
|
|
import java.awt.Graphics;
import java.awt.Panel;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.swing.JFrame;
public class Main extends Panel {
private BufferedImage images[];
private int imageIndex = 0;
public Main() throws Exception {
String filename = "a.png";
FileInputStream inputStream = new FileInputStream(filename);
String extensionName = filename.substring(filename.lastIndexOf('.') + 1);
Iterator readers = ImageIO.getImageReadersBySuffix(extensionName);
ImageReader imageReader = (ImageReader) readers.next();
ImageInputStream imageInputStream = ImageIO.createImageInputStream(inputStream);
imageReader.setInput(imageInputStream, false);
int num = imageReader.getNumImages(true);
images = new BufferedImage[num];
for (int i = 0; i < num; ++i) {
images[i] = imageReader.read(i);
}
inputStream.close();
}
public void paint(Graphics g) {
if (images == null)
return;
g.drawImage(images[imageIndex], 0, 0, null);
imageIndex = (imageIndex + 1) % images.length;
}
static public void main(String args[]) throws Exception {
JFrame frame = new JFrame();
Panel panel = new Main();
frame.add(panel);
frame.setSize(400, 400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
|
|
|
| Related examples in the same category |
| 1. | Add Image IO Read Progress Listener to ImageReader | | | | 2. | Read an Image from a file | | | | 3. | Read an Image from inputStream | | | | 4. | Read an Image from URL | | | | 5. | Determining the Format of an Image in a File | | | | 6. | Detect the file type of the input stream prior to reading the image | | | | 7. | List the image formats that can be read and written | | | | 8. | Get file format, image resolution, number of bits per pixel (JPEG, GIF, BMP, PCX, PNG, IFF, RAS, PBM, PGM, PPM, PSD and SWF files) | | | | 9. | Image format info | | | | 10. | Image observer blocks until the image is completely loaded. AWT defers the loading of images until they are painted on a graphic. | | |
|