Java Abstract Class Example ~ GTU

<html>

    <head>

        <title>Using Abstract Classes</title>

    </head>

    <body>

        <h1>Using Abstract Classes</h1>

<%!

            javax.servlet.jsp.JspWriter pw;

            abstract class Rectangle

               int length, breadth, area;

 abstract int getArea() throws java.io.IOException;

 public void setArea(int length, int breadth) throws java.io.IOException

                       this.length = length;

                       this.breadth = breadth;

                       pw.println("Calculating the area of a rectangle...........<br>");

                       pw.println("The area of rectangle is  ");

                       pw.println(getArea());

            class Rectangle1 extends Rectangle

                int getArea() throws java.io.IOException

                    area = length*breadth;

                    return(area);

%>

<%

            pw = out;

            Rectangle1 rect = new Rectangle1();

            rect.setArea(2,3);

%>

    </body>

</html>

MAP