[java]代码库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);

}

}

//源代码片段来自云代码http://yuncode.net