Source Code : Using Superclass Variables With Subclassed Objects

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Using Superclass Variables With Subclassed Objects

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

    <BODY>
        <H1>Using Superclass Variables With Subclassed Objects</H1>

        <%!
            javax.servlet.jsp.JspWriter localOut;

            class vehicle
            {
                public void start() throws java.io.IOException 
                {
                    localOut.println("Starting...<BR>");
                }
            }

            class aircraft extends vehicle
            {
                public void fly() throws java.io.IOException 
                {
                    localOut.println("Flying...<BR>");
                }
            }

            class plane extends aircraft
            {
                public void fly() throws java.io.IOException 
                {
                    localOut.println("Flying...<BR>");
                }
            }
        %>     
        <%
            localOut = out;     

            out.println();
            out.println("Creating a plane object...<BR>");
            vehicle p = new plane();
            p.start();
        %>
    </BODY>
</HTML>

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