Netbeans Tutorial: methods in jsp

Saturday, 17 December 2011

JSP Examples Tutorial - Using Parameterized Constructors

<HTML>
    <HEAD>
        <TITLE>Using Parameterized Constructors</TITLE>
    </HEAD>
    <BODY>
        <H1>Using Parameterized Constructors</H1>
        <%!
            javax.servlet.jsp.JspWriter localOut;
            class a
            {
                a() throws java.io.IOException 
                {
                    localOut.println("In a\"s constructor...<BR>");
                }
            }
            class b extends a  
            {
                b(String s) throws java.io.IOException 
                {
                    localOut.println("In b\"s String constructor...<BR>");
                    localOut.println(s);
                }
            }
        %>     
        <%
            localOut = out;     
            b obj = new b("Hello from JSP!<BR>");
        %>
    </BODY>
</HTML>

JSP Examples Tutorial - Runtime Polymorphism

<HTML>
    <HEAD>
        <TITLE>Runtime Polymorphism</TITLE>
    </HEAD>
    <BODY>
        <H1>Runtime Polymorphism</H1>
        <%!
            javax.servlet.jsp.JspWriter localOut;
            class BaseClass
            {
                public void print() throws java.io.IOException 
                {
                    localOut.println("Hello from BaseClass...<BR>");
                }
            }
            class DerivedClass1 extends BaseClass
            {
                public void print() throws java.io.IOException 
                {
                    localOut.println("Hello from DerivedClass1...<BR>");
                }
            }
            class DerivedClass2 extends BaseClass
            {
                public void print() throws java.io.IOException 
                {
                    localOut.println("Hello from DerivedClass2...<BR>");
                }
            }
            class DerivedClass3 extends BaseClass
            {
                public void print() throws java.io.IOException 
                {
                    localOut.println("Hello from DerivedClass3...<BR>");
                }
            }
        %>     
        <%
            localOut = out;     
 
            BaseClass a1 = new BaseClass(); 
            DerivedClass1 b1 = new DerivedClass1(); 
            DerivedClass2 c1 = new DerivedClass2(); 
            DerivedClass3 d1 = new DerivedClass3(); 
 
            BaseClass baseClassVariable;
 
            baseClassVariable = a1;
            baseClassVariable.print();
 
            baseClassVariable = b1;
            baseClassVariable.print();
 
            baseClassVariable = c1;
            baseClassVariable.print();
 
            baseClassVariable = d1;
            baseClassVariable.print();
        %>
    </BODY>
</HTML>

JSP Examples Tutorial - Overriding Methods in derived class

<HTML>
    <HEAD>
        <TITLE>Overriding Methods in derived class</TITLE>
    </HEAD>
    <BODY>
        <H1>Overriding Methods</H1>
        <%!
            javax.servlet.jsp.JspWriter localOut;
            class BaseClass
            {
                public void print()  throws java.io.IOException 
                {
                    localOut.println("print in base...<BR>");
                }
            }
            class DerivedClass extends BaseClass
            {
                public void print()  throws java.io.IOException 
                {
                    localOut.println("print in Derived class...<BR>");
                }
            }
        %>     
        <%
            localOut = out;     
            out.println("Creating an animal object...<BR>");
            BaseClass a = new BaseClass();
            a.print();
            out.println();
            out.println("Creating a trout object...<BR>");
            DerivedClass t = new DerivedClass();
            t.print();
        %>
    </BODY>
</HTML>

Netbeans Tutorial

Saturday, 17 December 2011

JSP Examples Tutorial - Using Parameterized Constructors

JSP Examples Tutorial - Runtime Polymorphism

JSP Examples Tutorial - Overriding Methods in derived class

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