Resizing an image and displaying

Question

hi all,
i am new to graphics,
i want to resize the image (say w=300,h=300) before displaying to panel,
i tried in the following code but no help? is this current way?
in imagepanel class i am calling *"resize(image,300,300)"*. i don't know is that current way of doing, please help me to solve this problem or give any suggestion.
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class drawImage extends JFrame {
    BufferedImage orignalImage = null;
    public drawImage() {
        try {
            orignalImage = ImageIO.read(new File("C:\\Documents and Settings\\Shafi\\Desktop\\daya\\ballot\\01000361FU-0003V01.jpg"));
        } catch (Exception e) {
            e.printStackTrace();
        imagepanel imp = new imagepanel(orignalImage, 5, 5);
        //imp.resize(imp, 200,200);
        getContentPane().add(imp);
        pack();
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    public static void main(String[] arg) {
        new drawImage();
class imagepanel extends JPanel {
    private BufferedImage image;
    int x;
    int y;
    public imagepanel(BufferedImage image, int x, int y) {
        super();
        this.image = image;
        this.x = x;
        this.y = y;
        image = resize(image,300,300);
        setPreferredSize(new Dimension(image.getWidth(), image.getHeight()));
   public BufferedImage resize(BufferedImage img, int newW, int newH) { 
        int w = img.getWidth(); 
            int h = img.getHeight(); 
            BufferedImage  dimg = new BufferedImage(newW, newH, img.getType()); 
            Graphics2D g = dimg.createGraphics(); 
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); 
            g.drawImage(img, 0, 0, newW, newH, 0, 0, w, h, null); 
            g.dispose(); 
            return dimg; 
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(image, x, y, null);
}thanks
dayananda b v

Answer 1

Hey friend try this out.
public static boolean createThumbnail(String selectedCategoryName, String imagePath, String imageName){
//imagePath=full image path
//imageName=name of the image(Eg:input.jpg)
try {
int thumbHeight=100;
int thumbWidth =100;
Image image = Toolkit.getDefaultToolkit().getImage(imagePath+"/"+imageName);
MediaTracker mediaTracker = new MediaTracker(new Container());
mediaTracker.addImage(image, 0);
mediaTracker.waitForID(0);
double thumbRatio = (double)thumbWidth / (double)thumbHeight;
if(thumbRatio < 1){
thumbRatio = (double)thumbHeight / (double)thumbWidth;
int imageWidth = image.getWidth(null);
int imageHeight = image.getHeight(null);
int temp=0;
if(thumbHeight <= imageHeight || thumbWidth <= imageWidth){
double imageRatio = (double)imageWidth / (double)imageHeight;
if (thumbRatio < imageRatio) {
thumbHeight = (int)(thumbWidth / imageRatio);
} else {
thumbWidth = (int)(thumbHeight * imageRatio);
}else if(thumbHeight > imageHeight && thumbWidth > imageWidth){
thumbWidth = imageWidth + 5;
thumbHeight = imageHeight + 5;
// draw original image to thumbnail image object and
// scale it to the new size on-the-fly
BufferedImage thumbImage = new BufferedImage(thumbWidth,
thumbHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = thumbImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);
// save thumbnail image to OUTFILE
BufferedOutputStream out = null;
out = new BufferedOutputStream(new
FileOutputStream(imagePath+"/preview_"+ imageName));
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.
getDefaultJPEGEncodeParam(thumbImage);
int quality = 100;//Integer.parseInt(args[4]);
quality = Math.max(0, Math.min(quality, 100));
param.setQuality((float)quality / 100.0f, false);
encoder.setJPEGEncodeParam(param);
encoder.encode(thumbImage);
image.flush();
thumbImage.flush();
out.flush();
out.close();
mediaTracker.removeImage(image);
mediaTracker = null;
thumbImage = null;
image = null;
encoder = null;
graphics2D = null;
System.out.println("Successfully Created Thumbnail.");
return true;
} catch (IOException ioe){
System.out.println("IO Error in writing the thumbnail:"+ ioe.getMessage());
return false;
} catch (Exception e){
System.out.println("Error in writing the thumbnail:"+ e.getMessage());
return false;
Regards..