import java.awt.Graphics;
 //定義一個Desk類
 class Desk
 {
    public String Color;
    public int Length;
    public int Width;
    public int Height;
 //計算桌子的體積
  int Volume()
    {
      return Length*Width*Height;
    }
   //輸出桌子的屬性值
void DeskMessage(Graphics g, int x,int y)
   {
     g.drawString("桌子的顏色："+Color,x,y);
     g.drawString("桌子的長度："+Length,x,y+20);
     g.drawString("桌子的寬度："+Width,x,y+40);
     g.drawString("桌子的高度："+Height,x,y+60);
   }
}

//該類聲明一個DeskDemo對象
public class DeskDemo extends java.applet.Applet
{
  public void paint(Graphics g)
  {
   Desk MyDesk=new Desk();//創建一個類Desk的實例賦給類型為Desk的對象變量MyDesk
   int  MyDeskVolume,Volume;  //定義體積變量
   // 給MyDesk的實例變量賦值
  MyDesk.Color="White";
  MyDesk.Length=27;
  MyDesk.Width=98;
  MyDesk.Height=45;
  //計算桌子的體積
  MyDeskVolume=MyDesk.Volume();
  g.drawString("體積是："+MyDeskVolume,20,20);
  MyDesk.DeskMessage(g,160,20);
  }
}