Working With Constructors and Inheritance : Class in JSP Page « JSP « Java Tutorial

<HTML>
    <HEAD>
        <TITLE>Working With Constructors and Inheritance</TITLE>
    </HEAD>

    <BODY>
        <H1>Working With Constructors and Inheritance</H1>
        <%!
            javax.servlet.jsp.JspWriter localOut;
            
            class BaseClass
            {
                BaseClass() throws java.io.IOException 
                {
                    localOut.println("In a\'s constructor...<BR>");
                }
                BaseClass(String s)  throws java.io.IOException
                {
                    localOut.println("In a\'s String constructor...<BR>");
                    localOut.println(s);
                }
            }
            
            class DerivedClass extends BaseClass  
            {
                DerivedClass(String s) throws java.io.IOException 
                {
                    super(s);
                    localOut.println("In b\'s String constructor...<BR>");
                    localOut.println(s);
                }
            }
        %>     
        <%
            localOut = out;     

            DerivedClass obj = new DerivedClass("Hello from JSP!<BR>");
        %>
    </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