图像的像素处理1（R,G,B变换）

1，学会了使用PixelGrabber类；

2，由于粗心在一个for循环后面多加了一个“；”，导致很久没找到程序错误。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Image.*;
import java.io.*;
import java.awt.image.*;
import java.awt.*;

public class graphicsTest extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  MenuBar menuBar1 = new MenuBar();
  Menu menu1 = new Menu();
  MenuItem menuItem1 = new MenuItem();
  Menu menu2 = new Menu();
  MenuItem menuItem2 = new MenuItem();
  JLabel lb=new JLabel();
  JPanel pl=new JPanel();
  MenuItem menuItem3 = new MenuItem();
  String strSource=null;
  String dir=null;
  MenuItem menuItem4 = new MenuItem();
  public graphicsTest() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

 
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    menu1.setLabel("File");
    menuItem1.setLabel("open");
    menuItem1.addActionListener(new Frame1_menuItem1_actionAdapter(this));
    menu2.setLabel("Edit");
    menuItem2.setLabel("split");
    menuItem2.addActionListener(new Frame1_menuItem2_actionAdapter(this));
    menuItem3.setLabel("change");
    menuItem3.addActionListener(new Frame1_menuItem3_actionAdapter(this));
    menuItem4.setLabel("pixels");
    menuItem4.addActionListener(new Frame1_menuItem4_actionAdapter(this));
    menuBar1.add(menu1);
    menuBar1.add(menu2);
    menu1.add(menuItem1);
    menu2.add(menuItem2);
    menu2.add(menuItem3);
    menu2.add(menuItem4);
    setMenuBar(menuBar1);
    contentPane.add(pl,BorderLayout.CENTER);
    pl.add(lb);
  }

   protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void menuItem1_actionPerformed(ActionEvent e) {

   FileDialog fd=new FileDialog(this,"Open");
    fd.show();
    if(fd.getFile()!=null){
      strSource = fd.getFile();
      dir=fd.getDirectory();
    }
    ImageIcon source=new ImageIcon(dir+strSource);
 lb.setIcon(source);
 lb.repaint();
  }

 
  void menuItem4_actionPerformed(ActionEvent e) {
    ImageIcon source=new ImageIcon(dir+strSource);
    int height=source.getIconHeight();
    int width=source.getIconWidth();
    Image im=source.getImage();
    int height1=im.getHeight(null);
    int width1=im.getWidth(null);
    //int i;
    int[] content=new int[width*height];
    PixelGrabber pg=null;
    try{
      pg = new PixelGrabber(im, 0, 0, width, height, content, 0,
                            width);
      if(pg.grabPixels()!=true)
        try{
          throw new java.awt.AWTException("pg error"+pg.status());
        }catch(Exception eq){eq.printStackTrace();}
    } catch(Exception ex){ex.printStackTrace();
      System.out.print("xxxx");}
    try{
      System.out.print(content.length);
      System.out.print(height*width);
      System.out.print(height1*width1);
      System.out.print(Integer.toHexString(content[479999]));
      //System.out.println (i);
     // for (int i=0; i <480000; i++);
     for(int i=0;i<height*width;i++)
      {
        //System.out.print(i);
        int red=(int)(((content[i]>>16)&0xff)*0.3);
        int green = (int)(((content[i] >> 8) & 0xff)*0.4);
        int blue = (int)(((content[i]) & 0xff)*0.11);
        blue = blue + 20;
        if (blue > 255)
          blue = 255;
        /*System.out.println ("i="+i);
        System.out.println ("content["+i+"]"+Integer.toHexString(content[i]));
        System.out.println ("green"+Integer.toHexString(green));
        System.out.println ("blue"+Integer.toHexString(blue));*/
        content[i] = (255<< 24) |(red << 16)| (green << 8)|blue;
      }
      Image pic=createImage(new MemoryImageSource(width,height,content,0,width));
      ImageIcon ic=new ImageIcon(pic);
      lb.setIcon(ic);
      Icon icon=lb.getIcon();
      lb.imageUpdate(pic,0,0,0,width,height);
      if(icon!=null)
      {
         ((ImageIcon)icon).getImage().flush();
      }
      lb.repaint();
    }catch(Exception ee)
    {ee.printStackTrace();}
  }

  public static void main(String args[])
  {
   new graphicsTest().show();
  }
 
}

class Frame1_menuItem1_actionAdapter implements java.awt.event.ActionListener {
  graphicsTest adaptee;

  Frame1_menuItem1_actionAdapter(graphicsTest adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.menuItem1_actionPerformed(e);
  }
}
class Frame1_menuItem4_actionAdapter implements java.awt.event.ActionListener {
  graphicsTest adaptee;

  Frame1_menuItem4_actionAdapter(graphicsTest adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.menuItem4_actionPerformed(e);
  }
}