java实现屏幕取色_编程语言综合--HTML5中文学习网

　　代码1。在屏幕上输出当前鼠标所在的屏幕颜色。

　　import java.awt.*;

　　public class PickColor {

　　public static void main(String[] args) {

　　PickColor pc = new PickColor();

　　Color color = pc.pickColor();

　　System.out.println("color = "+color);

　　}

　　public Color pickColor() {

　　Color pixel = new Color(0,0,0);

　　Robot robot = null;

　　Point mousepoint;

　　int R,G,B;

　　// MouseInfo mouseinfo = new MouseInfo();

　　try {

　　robot = new Robot();

　　} catch (AWTException e) {

　　e.printStackTrace();

　　System.exit(1);

　　}

　　mousepoint = MouseInfo.getPointerInfo().getLocation();

　　pixel = robot.getPixelColor(mousepoint.x,mousepoint.y);

　　R = pixel.getRed();

　　G = pixel.getGreen();

　　return pixel;

　　}

　　代码2。使用一个GUI，输出当前鼠标所在的屏幕颜色，并改变GUI的背景色。

　　// create by kin 2004/10/24 refer to http://dev.csdn.net/article/44/44529.shtm

　　import java.awt.*;

　　import java.awt.event.*;

　　import javax.swing.*;

　　import javax.swing.event.*;

　　public class PickColor2 extends JFrame {

　　public static void main(String[] args) {

　　PickColor2 pc = new PickColor2();

　　//Color color = pc.pickColor();

　　//System.out.println("color = "+color);

　　}

　　public PickColor2 () {

　　super("Pick Color");

　　setSize(200,200);

　　JPanel p =new JPanel();

　　getContentPane().add(p);

　　// this mouse listener only is limited in the java desktop region

　　p.addMouseMotionListener(new PickColorMouesMotionListener(p));

　　// this thread is really effected!

　　new PickColorThread(p).start();

　　setVisible(true);

　　}

　　/**Mouse Motion Listener,when mouse are moving, then set corresping screens color to the JPanels background Color. */

　　class PickColorMouesMotionListener extends MouseMotionAdapter {

　　private JPanel p = null;

　　PickColorMouesMotionListener(JPanel p) {

　　this.p = p;

　　}

　　public void mouseMoved(MouseEvent e) {

　　Color c = pickColor();

　　this.p.setBackground(c);

　　//System.out.println (c);

　　}

　　class PickColorThread extends Thread {

　　private JPanel p = null;

　　PickColorThread(JPanel p){

　　this.p=p;

　　}

　　public void run () {

　　while (true) {

　　try {

　　Thread.currentThread().sleep(10);

　　Color c = pickColor();

　　this.p.setBackground(c);

　　// try change the foreground when background s r <= 50 or g <= 50 or b <= 50

　　Graphics g = p.getGraphics ();

　　if (c.getRed() <=50 || c.getGreen() <= 50 || c.getBlue() <= 50) {

　　g.setColor(Color.WHITE);

　　} else {

　　g.setColor(Color.BLACK);

　　}

　　g.drawString(c.toString(),0,100);

　　g = null;

　　//System.out.println (c);

　　} catch (InterruptedException e) {

　　e.printStackTrace();

　　System.exit(1);

　　}

　　/**Get Screen Color*/

　　public Color pickColor() {

　　Color pixel = new Color(0,0,0);

　　Robot robot = null;

　　Point mousepoint;

　　int R,G,B;

　　// MouseInfo mouseinfo = new MouseInfo();

　　try {

　　robot = new Robot();

　　} catch (AWTException e) {

　　e.printStackTrace();

　　System.exit(1);

　　}

　　mousepoint = MouseInfo.getPointerInfo().getLocation();

　　pixel = robot.getPixelColor(mousepoint.x,mousepoint.y);

　　R = pixel.getRed();

　　G = pixel.getGreen();

　　return pixel;

　　}