[siddarth2111]

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;
import java.net.URL;
import javax.imageio.*;
import javax.imageio.metadata.*;
import javax.imageio.stream.*;
import org.w3c.dom.Node;
 
class WriteAnimatedGif {
	public static void configure(IIOMetadata meta,
								 String delayTime,
								 int imageIndex) {
		String metaFormat = meta.getNativeMetadataFormatName();
 
		if (!"javax_imageio_gif_image_1.0".equals(metaFormat)) {
			throw new IllegalArgumentException(
					"Unfamiliar gif metadata format: " + metaFormat);
		}

		Node root = meta.getAsTree(metaFormat);
 
		//find the GraphicControlExtension node
		Node child = root.getFirstChild();
		while (child != null) {
			if ("GraphicControlExtension".equals(child.getNodeName())) {
				break;
			}
			child = child.getNextSibling();
		}
 
		IIOMetadataNode gce = (IIOMetadataNode) child;
		gce.setAttribute("userInputFlag", "FALSE");
		gce.setAttribute("delayTime", delayTime);
 
		//only the first node needs the ApplicationExtensions node
		if (imageIndex == 0) {
			IIOMetadataNode aes =
					new IIOMetadataNode("ApplicationExtensions");
			IIOMetadataNode ae =
					new IIOMetadataNode("ApplicationExtension");
			ae.setAttribute("applicationID", "NETSCAPE");
			ae.setAttribute("authenticationCode", "2.0");
			byte[] uo = new byte[]{
				//last two bytes is an unsigned short (little endian) that
				//indicates the the number of times to loop.
				//0 means loop forever.
				0x1, 0x0, 0x0
			};
			ae.setUserObject(uo);
			aes.appendChild(ae);
			root.appendChild(aes);
		}
 
		try {
			meta.setFromTree(metaFormat, root);
		} catch (IIOInvalidTreeException e) {
			//shouldn't happen
			throw new Error(e);
		}
	}
 
	/** Adapted from code via GeoffTitmus on
	http://forums.sun.com/thread.jspa?messageID=9988198 */
	public static void saveAnimate(
			BufferedImage[] frames,
			//should ideally be an array -one for each frame
			String delayTime,
			File file) throws Exception {
 
		ImageWriter iw = ImageIO.getImageWritersByFormatName("gif").next();
 
		ImageOutputStream ios = ImageIO.createImageOutputStream(file);
		iw.setOutput(ios);
		iw.prepareWriteSequence(null);
 
		for (int i = 0; i < frames.length; i++) {
			BufferedImage src = frames[i];
			ImageWriteParam iwp = iw.getDefaultWriteParam();
			IIOMetadata metadata = iw.getDefaultImageMetadata(
					new ImageTypeSpecifier(src), iwp);
 
			configure(metadata, delayTime, i);
 
			IIOImage ii = new IIOImage(src, null, metadata);
			iw.writeToSequence(ii, (ImageWriteParam) null);
		}
 
		iw.endWriteSequence();
		ios.close();
	}
	public static void main(String[] args) throws Exception {
 
		String[] props = {
			"java.vendor",
			"java.version",
			"java.vm.version",
			"os.name",
			"os.version"
		};
 
		StringBuffer sb = new StringBuffer();
		String eol = System.getProperty("line.separator");
		for (String prop : props) {
			sb.append(prop);
			sb.append(" \t");
			sb.append(System.getProperty(prop));
			sb.append(eol);
		}
		System.out.print(sb);
 
		String name = "animatedstars.gif";
		// alow a runtime argument to provide the OP file name
		if (args.length > 0) {
			name = args[0];
		}
		String[] names = {
			"bronze",
			"silver",
			"gold",
			"platinum"
		};
		String pre = "http://forums.sun.com/im/";
		String suff = "-star.gif";
		BufferedImage[] frames = new BufferedImage[names.length];
		for (int ii = 0; ii < names.length; ii++) {
			URL url = new URL(pre + names[ii] + suff);
			System.out.println(url);
			frames[ii] = ImageIO.read(url);
		}
		File f = new File(name);
		// ensure we are getting a fresh file
		if (f.exists()) {
			if (!f.delete()) {
				System.err.println("Cannot delete file! " + f);
				System.exit(1);
			}
		}
		f.createNewFile();
 
		// save an animated GIF at 2 FPS.
		saveAnimate(frames, "50", f);
 
		JOptionPane.showMessageDialog(null, new ImageIcon(f.toURI().toURL()));
		// show it in the system default viewer
		Desktop.getDesktop().open(f);
	}
}

[NeoTifa]

What problems are you having?

[siddarth2111]

NeoTifa, on 23 Jul, 2009 - 08:43 AM, said:

What problems are you having?

this java gif player plays a gif file that downloads from the internet ,i just want to make changes in this code so that the file plays from my computer i.e i should be able to load a gif file from my computer not the file from the internet

[pbl]

Instead of reading from an URL read from a File

	   for (int ii = 0; ii < names.length; ii++) {
			URL url = new URL(pre + names[ii] + suff);
			System.out.println(url);
			frames[ii] = ImageIO.read(url);
		}

	   for (int ii = 0; ii < names.length; ii++) {
			File file = new File(.....file path....);
			frames[ii] = ImageIO.read(file);
		}

And don't post your question in the topic title it might get truncated

This post has been edited by pbl: 24 July 2009 - 10:45 PM

[g00se]

Your quickest way would be just to delete lines up to

>>BufferedImage[] frames = new BufferedImage[names.length];

then

a. make the arguments to main be called 'names'
b. always use the same output file name
c. Use file URLs and change

>>URL url = new URL(pre + names[ii] + suff);

to
URL url = new URL(names[ii]);