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Код

public BufferedImage Image2BufferedImage(Image image) {
        if (image instanceof BufferedImage) {return (BufferedImage)image;}
    
        // This code ensures that all the pixels in the image are loaded
        image = new ImageIcon(image).getImage();
    
        // Determine if the image has transparent pixels
        boolean hasAlpha = hasAlpha(image);
    
        // Create a buffered image with a format that's compatible with the screen
        BufferedImage bimage = null;
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        try {
            // Determine the type of transparency of the new buffered image
            int transparency = Transparency.OPAQUE;
            if (hasAlpha == true) {transparency = Transparency.BITMASK;}
    
            // Create the buffered image
            GraphicsDevice gs = ge.getDefaultScreenDevice();
            GraphicsConfiguration gc = gs.getDefaultConfiguration();
            bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
        } 
        catch (HeadlessException e) {} //No screen
    
        if (bimage == null) {
            // Create a buffered image using the default color model
            int type = BufferedImage.TYPE_INT_RGB;
            if (hasAlpha == true) {type = BufferedImage.TYPE_4BYTE_ABGR;}
            bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
        }
    
        // Copy image to buffered image
        Graphics g = bimage.createGraphics();
    
        // Paint the image onto the buffered image
        g.drawImage(image, 0, 0, null);
        g.dispose();
    
        return bimage;
    }

      public boolean hasAlpha(Image image) {
             // If buffered image, the color model is readily available
             if (image instanceof BufferedImage) {return ((BufferedImage)image).getColorModel().hasAlpha();}
         
             // Use a pixel grabber to retrieve the image's color model;
             // grabbing a single pixel is usually sufficient
             PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
             try {pg.grabPixels();} catch (InterruptedException e) {}
         
             // Get the image's color model
             return pg.getColorModel().hasAlpha();
         }