Java/JSP/Super Sub Class

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Using Superclass Variables With Subclassed Objects

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   <HEAD>
       <TITLE>Using Superclass Variables With Subclassed Objects</TITLE>
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Using Superclass Variables With Subclassed Objects

       <%!
           javax.servlet.jsp.JspWriter localOut;
           class vehicle
           {
               public void start() throws java.io.IOException 
               {
                   localOut.println("Starting...
");
               }
           }
           class aircraft extends vehicle
           {
               public void fly() throws java.io.IOException 
               {
                   localOut.println("Flying...
");
               }
           }
           class plane extends aircraft
           {
               public void fly() throws java.io.IOException 
               {
                   localOut.println("Flying...
");
               }
           }
       %>     
       <%
           localOut = out;     
           out.println();
           out.println("Creating a plane object...
");
           vehicle p = new plane();
           p.start();
       %>
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</HTML> 

      </source>
Источник — «http://jexp.ru/index.php?title=Java/JSP/Super_Sub_Class&oldid=8715»