java实现屏幕取色

<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> 声明： 本文核心代码选择自langzi84的blog请看以下链接 http://dev.youkuaiyun.com/article/44/article/44/44529.shtm http://blog.youkuaiyun.com/langzi84/archive/2004/10/21/146331.aspx 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.youkuaiyun.com/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; } }