ImageIO is unable to write buffered image to file

I am having some problem in writing bufferedimage to jpg file. in my method , i am getting a bufferedimage as parameter which i need to write in a file-

here is what i am doing :

public boolean writeToFile(BufferedImage buff,String savePath) {

        try {

            ImageIO.write(buff, ".jpg", new File(savePath));
            return true;
        } catch (Exception e) {

here is what gets printed by buff.toString() :

BufferedImage@8046f4: type = 1 DirectColorModel: rmask=ff0000 gmask=ff00 bmask=ff amask=0 IntegerInterleavedRaster: width = 1024 height = 172 #Bands = 3 xOff = 0 yOff = 0 dataOffset[0] 0

program runs fine without any exception, but the generated jpg file size is 0 bytes

i tried writing image without using ImageIO :

public boolean writeToFile(BufferedImage buff,String savePath) {

        try {

            System.out.println("got image : " + buff.toString());
            Iterator iter = ImageIO.getImageWritersByFormatName("jpeg");
            ImageWriter writer = (ImageWriter);
            ImageWriteParam iwp = writer.getDefaultWriteParam();


            File file = new File(savePath);
            FileImageOutputStream output = new FileImageOutputStream(file);
            IIOImage image = new IIOImage(buff, null, null);
            writer.write(null, image, iwp);

            return true;
        } catch (Exception e) {

        return false;

And this works absolutely fine.

Why it is not working with ImageIO ?


Remove the . from your format name.

ImageIO.write(buff, "jpg", new File(savePath));

Believe it or not, it's just this ".jpg", change it to "jpg" and it will work fine.

I had the same issue, but I looked at the ImageIO, and found this link.

Need Your Help

When I add a new servlet, all of my servelts can no longer be found

google-app-engine servlets

All I am doing is adding a new servlet to the web.xml like so:

Code coverage for async methods

visual-studio-2012 mstest code-coverage async-await c#-5.0

When I analyse code coverage in Visual Studio 2012, any of the await lines in async methods are showing as not covered even though they are obviously executing since my tests are passing. The code