画板能够捕捉到copy;露事件、鼠标事件和其他类似的事件。基本的画板类不处理这copy;事件，但你可以copy;展它来创建有你所需功能的画板类。

6.7.1创建画板

  importjava.awt.*;
  importjava.applet.Applet;
  publicclasssuperGUIextendsApplet{
    ...myCanvasdoodle;
    ...public
    void init(){
      ...
      //建立我们的画板
      doodle=new myCanvas();
      doodle.reshape(0,0,100,100);
      leftPanel.add(\"Center\",doodle);
      ...
    }
  }
  class myCanvasextendsCanvas{
    public void paint(Graphicsg){
      g.drawRect(0,0,99,99);
      g.drawString(\"Canvas\",15,40);
    }
  }

6.7.2画板事件

你可以覆盖一般的事件处理成员函数。下面是一个包含了mouseDown事件处理的例子：importjava.awt.*;importjava.applet.Applet;

  public class canvasextendsApplet{
  Buttonb1;
  publicvoidinit(){ 
    //
    SetourlayoutasaBorderstylesetLayout(newBorderLayout(15,15));
    b1=newButton(\"Test\");
    myCanvasc1=new myCanvas(100,100);
    //
    addthecanvasandthebuttontotheapplet
    add(\"Center\",c1);
    add(\"South\",b1);}
  publicbooleanaction(Evente,Objectarg){
    System.out.println(\"Event:\"+arg);
    return true;
  }
  public booleanmouseDown(Evente,intx,inty){
    System.out.println(\"Mouseworks:(\"+x+\",\"+y+\")\");
    returntrue;
  }
  }
  class myCanvasextendsCanvas{
    privateintwidth;privateintheight;
  publicmyCanvas(intw,inth){
    width=w;
    height=h;
    reshape(0,0,w,h);
  }
  public void paint(Graphicsg){
    g.setColor(Color.blue);
    g.fillRect(0,0,width,height);
  }
  publicbooleanmouseDown(Evente,intx,inty){
    if((x