bufferedimage

I'm saving the image of a signature as a .jpg picture. I use graphic2d to paint on the image every pixel of the signature (gotten with a signature tablet) and it works perfectly but I'm always gettin a white background. If I want to put the signature on a PDF document, the borders of the white square of the jpg image covers some of the words of the PDF. What I want to get is to save the jpg image with a transparent background, so when I put it on the PDF there are no words covered with the white image background but just the signature lines. This is the code that saves the buffered image. It

Is it correct that if we have a BufferedImage object in java, we could potentially write it out in ANY format using ImageIO.write (if we have a Writer object for the same)? I tried writing a BufferedImage object into a jpg file, it outputted an empty image file however when i tried writing it in to a png file, it worked fine. A BufferedImage can be written into any format that ImageIO.write supports (that is, has an ImageWriter available), yes. Please show the code if you can't get it to work. 来源： https://stackoverflow.com/questions/2543275/can-a-bufferedimage-be-written-to-file-any-format

I want to color a sub area of a BufferedImage I have. I am presently doing: public BufferedImage paintSubImage(BufferedImage img, int x, int y, int w, int h) { Graphics g = img.getGraphics(); g.setColor(Color.BLACK); g.fillRect(x,y,w,h); return img; } But I am not able to color it. Am I doing it wrong? Given the fact that there is little or no context to go on, it's difficult to know exactly what's wrong. General rule of thumb though, if you create/open it, you should dispose/close it... import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue;

I am trying to load an image file (gif) which is stored locally in the same directory as my Eclipse java project: ref is the relative path where the gif image is stored. public Sprite getSprite(String ref) { BufferedImage sourceImage = null; try { URL url = this.getClass().getClassLoader().getResource(ref); if (url == null) { fail("Can't find ref: "+ref); } sourceImage = ImageIO.read(url); } catch (IOException e) { fail("Failed to load: "+ref); } } The client code that uses the above method is: public Entity(String ref,int x,int y) { this.sprite = ResourceManager.getSprite("sprites/alien.gif")

Does anyone know how to print a BufferedImage in Java? Printing is just like drawing on the screen, so eventually you get a Graphics object, and you just drawImage into it. nsfyn55 I'm not sure what you mean by print. Print on a printer? Print to standard out? Write to a file? You can check out this tutorial from sun. If you're looking to write to a file. Open in your favorite image tool and print from there. http://download.oracle.com/javase/tutorial/2d/images/saveimage.html If you're building a graphical app and using something like AWT you can using the java printing API which would