图形截取代码

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图形截取代码
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.*;
import javax.swing.text.html.StyleSheet;
//Note : the extension is used for the
//String to Color conversion remove this reference
//and the functions it depends on,to create an applet
//that runs on older browsers without Java 1.2 installed.

/**
*@author 让痛苦痛苦
*@ 说明： ImageDisplay这个applet非常简单：完成初试化后，立即在applet标记内搜索参数，然后加载图片
*  （图片必需与applet存放在同一服务器上）,将其显示在一个图形窗筐中，最后在图形窗格上显示相关的文字。
*下面就是代码
*
*/
public class ImageDisplay extends Applet{

Image myImg;
MediaTracker mt;
String strDisplayOverlay="Copyright 2008 Todd Cook";
  int iOverlayXPosition =20;
  int iOverlayYPosition =20;
  int iFontSize=14;
  Color cOverlayColor =Color.white;
/**
*Construct the applet
*/

public ImageDisplay()
{

}

/***
   *Initialize the applet
   *
   *
   */

  public void init()
  {
   try {
    jbInit();

      }
      catch (Exception ex) {
      System.out.println (ex.getMessage());
      ex.printStackTrace();
      }
  }
  /**
   *Componen initialization
   */


   private void jbInit() throws Exception
   {
   mt=new MediaTracker(this);
   //The applet viewers on some IDEs merely take
   //the raw class file ,instead of loading the
   //HTML file for parameters,hence the coding
   //style of testing for nulls ,or otherwise
   //assiging default values.
   //Also one may use the applet viewer
   //in the JDK ,e.g. on Windows

   if(getParameter("DisplayImage")!=null)
   {
     myImg =getImage(getDocumentBase(),getParameter("DisplayImage"));
   }
   else
   {
     myImg =getImage(getDocumentBase(),"11.jpg");

   }

   if(getParameter("DisplayOverlay")!=null)
   {
     strDisplayOverlay=getParameter("DisplayOverlay");
   }

   if(getParameter("OverlayXPosition")!=null)
   {
     iOverlayXPosition =Integer.parseInt(getParameter("OverlayXPosition"));
   }

   if(getParameter("OverlayYPosition")!=null)
   {
     iOverlayYPosition=Integer.parseInt(getParameter("OverlayYPosition"));
   }

   if(getParameter("FontSize")!=null)
   {
     iFontSize=Integer.parseInt(getParameter("FontSize"));
   }

   if(getParameter("OverlayColor")!=null)
   {
     StyleSheet s=new StyleSheet();
     cOverlayColor =s.stringToColor(getParameter("OverlayColor"));
   }
   mt.addImage(myImg,1);

   try {
     mt.waitForAll();
     //stos program execution
     //until the image(s) are loaded
    }
    catch (Exception ex) {
    ex.printStackTrace();
    }
   }
   public void caint(Graphics g)
   {
   g.drawImage(myImg,0,0,this);
   g.setColor(cOverlayColor);
   g.setFont(new Font("Arial",Font.PLAIN,iFontSize));
   g.drawString(strDisplayOverlay,iOverlayXPosition,iOverlayYPosition);
   }
   /**
    *Get Applet information
    *
    */

    public String getAppletInfo()
    {
    return "Display a simple banner display over an image";

    }

    /**
     *Get parameter info
     */

     public String[][] getParameterInfo()
     {
     return null;
     }

     /***
      *
      *Main method
      */
      public static void main(String args[])
      {
      ImageDisplay applet=new ImageDisplay();
      Frame frame;
      frame=new Frame()
      {
        protected void processWindowEvent(WindowEvent e)
        {
         super.processWindowEvent(e);

         if(e.getID()==WindowEvent.WINDOW_CLOSING)
         {
          System.exit(0);
         }
        }
        public synchronized void setTitle(String title)
        {
         super.setTitle(title);
         enableEvents(AWTEvent.WINDOW_EVENT_MASK);
        }
      };
      frame.setTitle("Applet Frame");
      frame.add(applet,BorderLayout.CENTER);
      applet.init();
      applet.start();
      frame.setSize(800,600);
      Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
      frame.setLocation((d.width-frame.getSize().width)/2,(d.height-frame.getSize().height)/2);
      frame.setVisible(true);
      }
}