Creating a Simple Java Servlet Program to Add Two Numbers

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Summary: Learn how to develop a basic Java servlet program that adds two numbers. This step-by-step guide will help you understand the fundamentals of servlets and how to perform a basic arithmetic operation in a web application.
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Creating a Simple Java Servlet Program to Add Two Numbers

Java servlets are an essential part of web development, providing a server-side solution for handling HTTP requests. In this guide, we will walk through the process of creating a basic Java servlet program that adds two numbers. This example serves as a foundation for understanding servlet development and handling user inputs.

Prerequisites

Before starting, ensure you have the following:

Java Development Kit (JDK): Install a JDK on your machine if you haven't already. You can download it from the official Oracle website or use an open-source alternative like OpenJDK.

Apache Tomcat: Download and install Apache Tomcat, a widely used servlet container. You can obtain it from the official Apache Tomcat website.

Setting Up the Project

Create a Project Directory: Start by creating a project directory to organize your files.

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Create the Directory Structure: Inside the project directory, create the following directory structure:

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Writing the Servlet Code

Create the Servlet Class:

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Deploying and Testing

Compile the Servlet:

Compile the Java servlet using the following command:

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Deploy to Tomcat:

Copy the entire project directory to the Tomcat webapps directory.

Start Tomcat:

Start your Tomcat server.

Test the Servlet:

Conclusion

Congratulations! You have successfully created a simple Java servlet program to add two numbers. This example covers the basics of servlet development, parameter retrieval, and HTTP response handling. Feel free to expand on this foundation to build more complex servlet-based applications.