java做的“JEGE图像生成器”

import java.awt.*;
import java.util.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import com.sun.image.codec.jpeg.*;

class Point
{
 int x,y;
 Point(int x,int y)
 {
  this.x=x;
  this.y=y;
 }
}

public class MakeJPEG extends Canvas implements MouseMotionListener,MouseListener,ActionListener
{ 
   int x=-1,y=-1,橡皮擦通知=0,清除通知=0;
   Vector v=null;int n=1;
   Graphics2D  ggg ;    //负责将图形绘制到image的画笔对象                                        
   BufferedImage image; //图像对象                                      
   Frame window;
   Button 保存,调色板,橡皮,清除,画笔,获取屏幕,绘制图形;
   Color 画笔颜色;
   Panel pCenter,pSouth,pNorth;
 
 public MakeJPEG()
 {
    保存=new Button("将绘制的图形或屏幕保存为JPG文件");
    获取屏幕=new Button("获取屏幕");
    绘制图形=new Button("绘制图形");
    调色板=new Button("打开调色板");
    画笔=new Button("画笔");
    橡皮=new Button("橡皮");
    清除=new Button("清除");
    调色板.addActionListener(this);
    绘制图形.addActionListener(this);
    保存.addActionListener(this);
    画笔.addActionListener(this);
    橡皮.addActionListener(this);
    清除.addActionListener(this);
    获取屏幕.addActionListener(this);
    画笔颜色=new Color(0,0,0);
    addMouseMotionListener(this);
    addMouseListener(this);
    v=new Vector();
    setBackground(Color.white);   //设置画布颜色
   
    //创建一个宽高各为210个像素的待绘制的image对象
    image=new BufferedImage(210,210,BufferedImage.TYPE_INT_RGB);
    ggg=image.createGraphics();    //创建在image对象中进行绘制的画笔对象                            
    Rectangle2D rect=new Rectangle2D.Double(0,0,210,210);     
    ggg.setColor(getBackground());
    ggg.fill(rect);      //将图像的底色设置为和画布相同                                      
    window=new Frame("JPEG图像生成器");
    pCenter=new Panel();
    pCenter.setLayout(null);
    pCenter.add(this);
    pCenter.setBackground(Color.gray);
    this.setBounds(80,30,210,210);         //设置画布的大小和图像的大小相同                    
    window.add(pCenter,BorderLayout.CENTER);
    pNorth=new Panel();
    pNorth.add(保存);
    pNorth.add(绘制图形);
    pNorth.add(获取屏幕);
    window.add(pNorth,BorderLayout.NORTH);
    pSouth=new Panel();
    pSouth.add(调色板);
    pSouth.add(橡皮);
    pSouth.add(清除);
    pSouth.add(画笔);
    window.add(pSouth,BorderLayout.SOUTH);
    window.setVisible(true);
    window.addWindowListener(new WindowAdapter()
                   {
                     public void windowClosing(WindowEvent e)
                     {
                        System.exit(0);
                    }
                  });
    window.setBounds(100,80,390,380);
    window.validate();   //确保窗口中的组件能正确显示出来                                     
 }
 
 public void paint(Graphics g)      //负责在画布中绘制图形的笔画对象                          
 {
    if(x!=-1&&y!=-1&&橡皮擦通知==0&&清除通知==0)
     { 
        g.setColor(画笔颜色);
        n=v.size();
        for(int i=0;i<n-1;i++)
         {
           Point p1=(Point)v.elementAt(i);
           Point p2=(Point)v.elementAt(i+1);
           g.drawLine(p1.x,p1.y,p2.x,p2.y);        //画笔g在画布中绘制图形            
           ggg.setColor(g.getColor());    
           ggg.drawLine(p1.x,p1.y,p2.x,p2.y);      //同时画笔ggg也在image中绘制图形            
         }
     }
    else if(橡皮擦通知==1&&清除通知==0)          //擦去4X4大小区域的图形
     {
       g.setColor(getBackground());
       g.fillRect(x-2,y-2,4,4);
       ggg.setColor(getBackground());
       ggg.fillRect(x-2,y-2,4,4);
     }
   else if(清除通知==1&&橡皮擦通知==0)       //清除画布及image中的图形
     {
       g.setColor(getBackground());
       g.fillRect(0,0,200,200);
       ggg.setColor(getBackground());
       ggg.fillRect(0,0,200,200);
     }

    g.drawImage(image,0,0,200,200,this);       //将image对象绘制到画布中               
 }
public void mouseDragged(MouseEvent e)
 { 
      x=(int)e.getX();
      y=(int)e.getY();
      Point p=new Point(x,y);
      v.addElement(p);
      repaint();
 }
  public void mouseMoved(MouseEvent e)
  {}
  public void mousePressed(MouseEvent e)
  {}
  public void mouseReleased(MouseEvent e)  //放开鼠标，则清除图形向量
   {  
      v.removeAllElements();
   }
  public void mouseEntered(MouseEvent e){}
  public void mouseExited(MouseEvent e){}
  public void mouseClicked(MouseEvent e){}
 
  public void update(Graphics g)
  {
    {
      paint(g);
    }
  }
  public void actionPerformed(ActionEvent e)
  {
    if(e.getSource()==橡皮)
       {
         橡皮擦通知=1;
         清除通知=0 ;
       }
    else if(e.getSource()==清除)
       {
         清除通知=1;
         橡皮擦通知=0;
         repaint();
       }
    else if(e.getSource()==画笔)
    {
      橡皮擦通知=0;
      清除通知=0;
    }

    else if(e.getSource()==保存)
       {
     //显示“保存文件”对话框
          FileDialog savedialog=new FileDialog(window,"保存图型到JPG格式",FileDialog.SAVE);
         
          //该对话框是有模式对话框，只有收到响应，程序才能继续执行
          savedialog.setVisible(true);  
                                        
          //选择对话框的yes或cancel按钮后，对话框自动关闭，程序继续执行
          if(savedialog.getFile()!=null)
           //如果选择了yes，getFile（）将返回文件的名字
             {
                try{
                 //JPEG文件的命名由对话框负责
                     String fileName=savedialog.getFile();   
                     FileOutputStream out=new FileOutputStream(fileName);
                    
                     //获取一个JPEG编码器
                     JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(out);
                    
                     //获取解码器的编码参数
                     JPEGEncodeParam param=encoder.getDefaultJPEGEncodeParam(image);
                    
                     //将图像质量设置为100%
                     param.setQuality(1.0f,false);
                     encoder.setJPEGEncodeParam(param);
                    
                     //编码器负责将image写入输出流out
                     encoder.encode(image);
                     out.close();
                   }
               catch(Exception EE)
                   {
                   }
             }    
       }
    else if(e.getSource()==获取屏幕)
       {
         Robot robot=null;          //用来获取屏幕图像的Robot对象                    
         try{
             robot=new  Robot();                        
            }
         catch(Exception er)
            {
            }
         Rectangle screenRect=null;             //用来确定image大小的矩形对象        
         int width=getToolkit().getScreenSize().width;   //获取屏幕的宽
         int height=getToolkit().getScreenSize().height;  //获取屏幕的高
         screenRect=new Rectangle(0,0,width,height);
       
         window.setVisible(false);                       //隐去当前Java程序窗口，以使获取屏幕图像
         this.window.setVisible(false);
         image=robot.createScreenCapture(screenRect);    //将屏幕图像存入image
         window.setVisible(true);                         //重新显示当前程序窗口
         repaint();                                     
       }
   else if(e.getSource()==调色板)        //选择画颜色
       {
         Color tempColor=JColorChooser.showDialog(window,"调色板",画笔颜色);
           {
             if(tempColor!=null)
               {
                 画笔颜色=tempColor;
                 画笔.setForeground(画笔颜色);
               }
           }
       }
   else if(e.getSource()==绘制图形)
       {
         window.dispose();              //释放窗口                  
         this.window.dispose();
         MakeJPEG canvas=new MakeJPEG();  //创建画布对象
       }
  }
 public static void main(String args[])
  {
    new MakeJPEG();
  }
}

 

然后解决Eclipse的设置问题
这个事eclipse的设置问题，它默认把这些受访问限制的API设成了ERROR，你只要把
Windows-Preferences-Java-Complicer-Errors/Warnings
里面的Deprecated and restricted API中的Forbidden references(access rules)选为Warning就可以编译通过了。

成功通过，真是太有才了，哈哈