Saving a dynamically created Image to a File.

Question

I have an image, I read the image, add a few things to image (like some text etc).

All this I do inside a JPanel.

Now, I want to save the resulting image to a .png file.

I think, there is a way to do this for a buffered image using ImageIO.write()

But I cannot convert the dynamically created image to a BufferedImage.

Is there a way I can go about this ?

For [example](http://stackoverflow.com/questions/17690275/exporting-a-jpanel-to-an-image/17690351#17690351) — MadProgrammer, Mar 20 '14 at 01:53
I tried using: BufferedImage image = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB); But all the values for the transparency parameter kept on giving an exception saying "Unknown Image type". — user966123, Mar 20 '14 at 02:01
You'd need to provide a runnable example before I would even be able to guess why. The example I linked works just fine... — MadProgrammer, Mar 20 '14 at 02:07
Convert your image into BufferedImage. http://stackoverflow.com/questions/13605248/java-converting-image-to-bufferedimage — huocp, Mar 20 '14 at 02:12

score 2 · Answer 1 · answered Mar 20 '14 at 01:53

2

You can use the Screen Image class.

It will create a BufferedImage of your JPanel. The class also has code to write the image to a file.

answered Mar 20 '14 at 01:53

camickr

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score 2 · Answer 2 · answered Mar 20 '14 at 05:30

All this I do inside a JPanel.

Do it instead in another BufferedImage displayed in a JLabel. The code can get a Graphics2D object using BufferedImage.createGraphics() method. Paint the image and text to the new Graphics2D instance and you then the new image can be saved directly, along with changes.

score 1 · Answer 3 · answered Mar 20 '14 at 03:18

Use Following method it worked for me...

void TakeSnapShot(JPanel panel,String Locatefile){  
           BufferedImage bi = new BufferedImage(panel.getSize().width,  panel.getSize().height,BufferedImage.TYPE_INT_RGB);  

           panel.paint(bi.createGraphics()); 

           File image = new File(Locatefile);  
        try{  
            image.createNewFile();  
            ImageIO.write(bi, "png", image);
        }catch(Exception ex){  
        }  
    }

Saving a dynamically created Image to a File.

3 Answers3