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https://github.com/abhraneel2004/oops_lab_2024


https://github.com/abhraneel2004/oops_lab_2024

java oops-in-java

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README 

        

# Object Oriented Programming Lab



Welcome to the Object Oriented Programming Lab repository! This repository contains implementations of various object-oriented programming concepts using Java. Whether you're a beginner looking to learn or an experienced developer seeking reference implementations, you've come to the right place.



## Cheat Sheet 😉



Java Cheat Sheet





  Using Replit
 




# Step-by-Step Guide: How to Use Java in Replit.com



Replit.com is a powerful online IDE that allows you to write, run, and share code directly in your browser. Follow these steps to use Java in Replit.



## Step 1: Create a New Repl



1. **Visit Replit:** Open your web browser and go to [Replit.com](https://replit.com).

2. **Log In/Sign Up:** If you don't have an account, sign up for one. If you do, log in.

3. **Start a New Repl:** Click the `+ Create` button on the top left of the dashboard.



## Step 2: Select the Java Template



1. **Choose Template:** In the "Create a new Repl" window, type "Java" in the search bar.

2. **Select Java:** Click on the "Java" template.



## Step 3: Set Up Your Project



1. **Name Your Repl:** Enter a name for your project in the "Title" field.

2. **Create Repl:** Click the `Create Repl` button.



## Step 4: Write Your Java Code



1. **Open the Main Class:** In the Replit IDE, you will see a file named `Main.java` opened by default.

2. **Edit the Code:** Write your Java code in the `Main.java` file. For example, you can start with a simple program:

    ```java

    public class Main {

        public static void main(String[] args) {

            System.out.println("Hello, World!");

        }

    }

    ```

3. **Save Your Work:** Replit automatically saves your changes, but you can manually save them by clicking `Ctrl + S` or using the save button.



## Step 5: Run Your Java Program



1. **Run the Program:** Click the `Run` button at the top of the screen. This will execute your `Main.java` program.

2. **View Output:** The output of your program will be displayed in the console at the bottom of the screen.



## Step 6: Explore and Share



1. **Explore:** Feel free to explore more features of Replit, such as version control, collaborative coding, and more.

2. **Share Your Repl:** You can share your project by clicking the `Share` button and copying the link to share with others.



## Example Program



Here's an example of a simple Java program that calculates the factorial of a number:



```java

import java.util.Scanner;



public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter a number: ");

        int number = scanner.nextInt();

        int result = factorial(number);

        System.out.println("The factorial of " + number + " is " + result);

    }



    public static int factorial(int n) {

        int facto = 1;

        for (int i = 1; i <= n; i++) {

            facto *= i;

        }

        return facto;

    }

}

```



## Running the Example Program



1. **Copy the Program:** Copy the above program into your `Main.java` file.

2. **Run the Program:** Click the `Run` button to execute the program.

3. **Input a Number:** When prompted, enter a number to see its factorial.



---



By following these steps, you can easily write and execute Java programs using Replit.com. Happy coding!





  Installation and Setup on Local Machine
 




### 1. Install Java



Make sure you have Java installed. You can install it using the following steps:



#### For Windows:

1. **Download Java:** Go to the [Java SE Development Kit (JDK) download page](https://www.oracle.com/java/technologies/javase-jdk11-downloads.html) and download the installer for Windows.

2. **Install Java:** Run the downloaded installer and follow the instructions to install Java.



#### For macOS:

1. **Download Java:** Go to the [Java SE Development Kit (JDK) download page](https://www.oracle.com/java/technologies/javase-jdk11-downloads.html) and download the installer for macOS.

2. **Install Java:** Run the downloaded installer and follow the instructions to install Java.



#### For Linux:

1. **Update package list:** Open your terminal and run:

    ```bash

    sudo apt-get update

    ```

2. **Install Java:** Run the following command to install the default JDK:

    ```bash

    sudo apt-get install default-jdk

    ```



### 2. VS Code (Optional)



Download and install [Visual Studio Code](https://code.visualstudio.com/). This repository is configured with a `.vscode` folder containing useful settings for your coding environment.





  Running the Code
 




Navigate to the specific directory of the code you want to run and use the following commands:



```bash

# Compile the Java program

javac Main.java



# Run the Java program

java Main

```



Replace `Main.java` with the name of your Java file.





  Contributing
 




We welcome contributions from the community! To contribute to this project, follow these steps:



1. Fork the repository.

2. Create a new branch for your feature or bug fix: `git checkout -b feature-name`.

3. Make your changes and commit them with a descriptive commit message.

4. Push your changes to your fork: `git push origin feature-name`.

5. Open a pull request to the main repository.



Below is an explanation of the commands for forking and contributing to a GitHub repository:





  Forking the Repository
 




1. **Fork the repository:** Click the "Fork" button at the top right of the repository page. This creates a copy of the repository in your GitHub account.



   ![Forking](gifs/fork.gif)



2. **Clone your forked repository:** Open your terminal and run the following command to clone the repository to your local machine:



   ```bash

   git clone https://github.com/your-username/repository.git

   ```



   Replace `your-username` with your GitHub username and `repository` with the name of the repository.



   ![Clone](gifs/clone.gif)



## Contributing



1. **Create a new branch:** Move into the repository directory and create a new branch for your feature or bug fix:



   ```bash

   cd repository

   git checkout -b feature-name

   ```



   Replace `feature-name` with a descriptive name for your contribution.



   ![Branch](gifs/branch.gif)



2. **Make your changes:** Modify the code, add new features, or fix bugs. Once done, stage and commit your changes:



   ```bash

   git add .

   git commit -m "Description of changes"

   ```



   Replace "Description of changes" with a concise and descriptive commit message.



   ![Commit](gifs/commit.gif)



3. **Push to your fork:** Push your changes to your forked repository on GitHub:



   ```bash

   git push origin feature-name

   ```



   Replace `feature-name` with the name of your branch.



   ![Push](gifs/push.gif)



4. **Create a Pull Request (PR):** Go to the GitHub page of your forked repository. GitHub will detect the recent push and display a "Compare & pull request" button. Click on it to create a new