为了避免遍历像素，请更改基础ColorModel。这是一个例子。以下是作者使用原始BufferedImage并应用新颜色模型的代码段。
private static BufferedImage createImage() { int width = 200; int height = 200; // Generate the source pixels for our image // Lets just keep it to a simple blank image for now byte[] pixels = new byte[width * height]; DataBuffer dataBuffer = new DataBufferByte(pixels, width*height, 0); SampleModel sampleModel = new SinglePixelPackedSampleModel( DataBuffer.TYPE_BYTE, width, height, new int[] {(byte)0xf}); WritableRaster raster = Raster.createWritableRaster( sampleModel, dataBuffer, null); return new BufferedImage(createColorModel(0), raster, false, null);}private static ColorModel createColorModel(int n) { // Create a simple color model with all values mapping to // a single shade of gray // nb. this could be improved by reusing the byte arrays byte[] r = new byte[16]; byte[] g = new byte[16]; byte[] b = new byte[16]; for (int i = 0; i < r.length; i++) { r[i] = (byte) n; g[i] = (byte) n; b[i] = (byte) n; } return new IndexColorModel(4, 16, r, g, b);}private BufferedImage image = createImage();image = new BufferedImage(createColorModel(e.getX()), image.getRaster(), false, null);
