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JSP declarations

JSP (JavaServer Pages) declarations allow you to declare variables, methods, and other program elements directly within your JSP page. Here's an example of how to use JSP declarations:

jsp
Copy code
<%!
  int num = 42;
  String message = "Hello, JSP!";
%>
<html>
  <body>
    <p>The value of num is <%= num %></p>
    <p>The message is <%= message %></p>
  </body>
</html>

In this example, we're using a JSP declaration to declare two variables, num and message. The declaration is delimited by the characters <%! and %>. The variables are then used later in the JSP page, within an HTML paragraph (<p>) tag.

JSP declarations can contain any valid Java code, including class and interface definitions, method declarations, and variable declarations. Here are some more examples of JSP declarations:

jsp
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<!-- Declare a method -->
<%!
  public int add(int a, int b) {
    return a + b;
  }
%>

<!-- Declare a constant -->
<%!
  final int MAX_NUM = 100;
%>

<!-- Declare a class -->
<%!
  public class Person {
    private String name;
    private int age;
    // constructor and methods omitted for brevity
  }
%>




Next: Using JSP actions

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