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To set up Maven on your computer, follow these steps:

1. Download Maven: Visit the Apache Maven website (https://maven.apache.org/) and navigate to the "Download" section. Choose the appropriate Maven version for your operating system and download the binary zip file.

2. Extract Maven: Once the download is complete, extract the contents of the Maven zip file to a directory of your choice. This directory will be referred to as the "Maven home directory."

3. Set Environment Variables: Add the Maven home directory to the system's PATH environment variable. This allows you to run Maven commands from any location in the command prompt or terminal. The specific steps for setting environment variables vary depending on your operating system: - Windows: Go to Control Panel -> System and Security -> System -> Advanced System Settings. Click the "Environment Variables" button, find the "Path" variable in the "System variables" section, and edit it to include the Maven home directory. - macOS/Linux: Open a terminal and edit the `.bash_profile` or `.bashrc` file in your user's home directory. Add the following line at the end, replacing `/path/to/maven` with the actual Maven home directory: `export PATH=/path/to/maven/bin:$PATH`. Save the file and restart the terminal.

4. Verify Maven Installation: Open a new terminal or command prompt and type `mvn -version`. This command should display the Maven version and other related information. If you see the version details, Maven is successfully installed.

Maven is now set up on your computer. You can use it to create and build Java projects, manage dependencies, and perform various build tasks using the Maven command-line interface (CLI) or integrated development environments (IDEs) that support Maven integration.

Note: It's important to have Java Development Kit (JDK) installed on your computer before setting up Maven, as Maven relies on Java to compile and build projects. Ensure that the JAVA_HOME environment variable is also set appropriately to point to your JDK installation.

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Problem Statement: Create a Java application that calculates the factorial of a given number.
Requirements:
- The application should take a number as input from the user.
- It should calculate the factorial of the input number.
- The calculated factorial should be displayed as output.
To solve this problem, you can follow these steps:
1. Create a new Maven project using the Maven command provided in the concept section.
2. Open the `pom.xml` file and update the `<groupId>`, `<artifactId>`, and `<version>` tags according to your project's details.
3. Add any necessary dependencies to the `<dependencies>` section of the `pom.xml` file.
4. Create a new Java class, e.g., `FactorialCalculator`, in the `src/main/java/com/example` directory.
5. Implement the factorial calculation logic in the `FactorialCalculator` class.
6. Build the project using Maven:

   mvn clean package
 

This command will compile your code, package it into a JAR file, and place it in the `target` directory.
7. Run the application:

   java -cp target/myproject-1.0-SNAPSHOT.jar com.example.FactorialCalculator

Replace `myproject-1.0-SNAPSHOT.jar` with the actual name of the JAR file generated by Maven.
8. Follow the instructions in the application to enter a number and see the factorial result displayed. This will give you a basic understanding of using a `pom.xml` file in Maven to manage dependencies, compile your code, and package it into an executable JAR file.

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