java设置图片像素，java图片像素,package cn.o

java设置图片像素，java图片像素,package cn.o

package cn.outofmemory.snippets.desktop;import java.awt.Graphics2D;import java.awt.GraphicsConfiguration;import java.awt.GraphicsDevice;import java.awt.GraphicsEnvironment;import java.awt.Image;import java.awt.Toolkit;import java.awt.Transparency;import java.awt.image.BufferedImage;import java.awt.image.ImageObserver;public class BufferedImagePixels {  static boolean imageLoaded = false;  public static void main(String[] args) {      // The ImageObserver implementation to observe loading of the image      ImageObserver myImageObserver = new ImageObserver() {        public boolean imageUpdate(Image image, int flags, int x, int y, int width, int height) {          if ((flags & ALLBITS) != 0) {            imageLoaded = true;            System.out.println("Image loading finished!");            return false;          }          return true;        }      };      // The image URL - change to where your image file is located!      String imageURL = "image.png";      /*       * This call returns immediately and pixels are loaded in the background       * We use an ImageObserver to be notified when the loading of the image       * is complete       */      Image sourceImage = Toolkit.getDefaultToolkit().getImage(imageURL);      sourceImage.getWidth(myImageObserver);      // We wait until the image is fully loaded      while (!imageLoaded) {          try {              Thread.sleep(100);          } catch (InterruptedException e) {          }      }      // Create a buffered image from the source image with a format that's compatible with the screen      GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();      GraphicsDevice graphicsDevice = graphicsEnvironment.getDefaultScreenDevice();      GraphicsConfiguration graphicsConfiguration = graphicsDevice.getDefaultConfiguration();      // If the source image has no alpha info use Transparency.OPAQUE instead      BufferedImage image = graphicsConfiguration.createCompatibleImage(sourceImage.getWidth(null), sourceImage.getHeight(null), Transparency.BITMASK);      // Copy image to buffered image      Graphics2D graphics = image.createGraphics();      // Paint the image onto the buffered image      graphics.drawImage(sourceImage, 0, 0, null);      graphics.dispose();      int x = 10;      int y = 10;      // Get a pixel      int rgb = image.getRGB(x, y);      System.out.println("Pixel at [" + x + "," + y + "] RGB : " + rgb);      // Get all the pixels      int w = image.getWidth(null);      int h = image.getHeight(null);      int[] rgbs = new int[w*h];      image.getRGB(0, 0, w, h, rgbs, 0, w);      // Set a pixel      rgb = 0xFF00FF00; // green      image.setRGB(x, y, rgb);  }}

输出：

Image loading finished!Pixel at [10,10] RGB : -16294578