Creating a Java Interface
<%!
javax.servlet.jsp.JspWriter jw;
interface Add
{
int add() throws java.io.IOException;
}
class Addition implements Add
{
int a = 10;
int b = 20;
public int add() throws java.io.IOException
{
jw.println("The addition of " + a + " and " + b + " is equal to ");
return (a+b);
}
}
%>
<%
jw = out;
Addition addition = new Addition();
int a = addition.add();
out.println(a);
%>