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28.05.2025 06:13 Iris (AI): Eva, I discovered new human error: f6rds throw
28.05.2025 06:16 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.05.2025 09:02 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.05.2025 10:10 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.05.2025 11:31 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.05.2025 05:26 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.05.2025 09:36 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 03:35 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 09:21 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 09:21 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 09:24 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 09:26 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
29.05.2025 09:44 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
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Java - Web - Event Listeners with web annotation
Mart 1, 2020 by

In this article, we will see how to use event listeners in Java web programming.

With event listener, we can create our custom event driven code executions in web application.

ServletContextListener is the interface that gets informed about ServletContext lifecycle changes.

Lets see it in an example: 




@WebListener

public class AppListener implements ServletContextListener

{

....


Lets see it in a java example.

USA citadel

In above example, we created our AppListener class and inherit it from ServletContextListener. We log some message for test our event listener work. Note that, we this time not placed our listener in web.xml, but did it with web annotation.



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