Using Superclass Variables With Subclassed Objects : Class in JSP Page « JSP « Java Tutorial

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

            class DerivedClass1 extends BaseClass
            {
                public void fly() throws java.io.IOException 
                {
                    localOut.println("Flying...<BR>");
                }
            }

            class DerivedClass2 extends DerivedClass1
            {
                public void fly() throws java.io.IOException 
                {
                    localOut.println("Flying...<BR>");
                }
            }
        %>     
        <%
            localOut = out;     

            out.println();
            out.println("Creating a DerivedClass2 object...<BR>");
            BaseClass p = new DerivedClass2();
            p.start();
        %>
    </BODY>
</HTML>

23.14.Class in JSP Page
	23.14.1.	Using Inheritance
	23.14.2.	Using Restricted Access
	23.14.3.	Calling Superclass Constructors
	23.14.4.	Using Parameterized Constructors
	23.14.5.	Working With Constructors and Inheritance
	23.14.6.	Overloading Methods
	23.14.7.	Overriding Methods in derived class
	23.14.8.	Using Superclass Variables With Subclassed Objects
	23.14.9.	Runtime Polymorphism
	23.14.10.	Using Abstract Classes
	23.14.11.	Creating a Java Interface