Lader.java
packagetom.jiafei;
public class Lader
{ doubleabove,bottom,area;
publicLader()
{ above=1;
bottom=1;
area=(above+bottom)/2.0;
}
public double getAbove()
{ return above;
}
public void setAbove(double above)
{ this.above=above;
}
public double getBottom()
{ return bottom;
}
public void setBottom(double bottom)
{ this.bottom=bottom;
}
public double getArea()
{ area=(above+bottom)/2.0;
return area;
}
}
jsp帮助文档useBean.jsp
<%@ page contentType="text/html;Charset=GB2312" %>
<%@ page import="tom.jiafei.*"%>
<HTML>
<BODY bgcolor=cyan><Font size=5>
<jsp:useBean id="lader" class="tom.jiafei.Lader" scope="page" /> <% lader.setAbove(300);
lader.setBottom(2300);
%>
<P>梯形的上底是：<%=Above()%>
<P>梯形的下底是：<%=Bottom()%>
<P>梯形的面积是：<%=Area()%>
</BODY></HTML>

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