This example shows how to use an Abstract Class in JSP.
We can create an Abstract Class and write it’s implementation in the Declaration Tag of JSP file.
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<HTML> <HEAD> <TITLE>Using Abstract Classes</TITLE> </HEAD> <BODY> <H1>Using Abstract Classes</H1> <%! javax.servlet.jsp.JspWriter localOut; abstract class a { abstract String getText() throws java.io.IOException; public void printem() throws java.io.IOException { localOut.println(getText()); } } class b extends a { String getText() throws java.io.IOException { return "Hello from JSP!"; } } %> <% localOut = out; b bObject = new b(); bObject.printem(); %> </BODY> </HTML> |