Java module example github

Java module example github

Here's an example of a Java module from GitHub:

Module: Simple Calculator with Basic Math Operations

Description:

This is a simple Java module that provides basic math operations like addition, subtraction, multiplication, and division. The module includes a Calculator class that takes two numbers as input and performs the desired operation based on user selection.

Features:

Usage:

To use this module, simply create an instance of the Calculator class and call its methods to perform calculations. Here's an example:

public class Main {
public static void main(String[] args) {
Calculator calculator = new Calculator();
double result1 = calculator.add(2, 3); // Adds 2 + 3 = 5
System.out.println("Result: " + result1);
double result2 = calculator.subtract(4, 2); // Subtracts 4 - 2 = 2
System.out.println("Result: " + result2);
double result3 = calculator.multiply(3, 4); // Multiplies 3 * 4 = 12
System.out.println("Result: " + result3);
double result4 = calculator.divide(10, 2); // Divides 10 / 2 = 5.0
System.out.println("Result: " + result4);
}
}

Code:

Here is the complete code for the Calculator class:

public class Calculator {
public double add(double a, double b) {
return a + b;
}
public double subtract(double a, double b) {
return a - b;
}
public double multiply(double a, double b) {
return a * b;
}
public double divide(double a, double b) {
if (b == 0) {
throw new ArithmeticException("Division by zero!");
}
return a / b;
}
}

License:

This module is licensed under the MIT License. You are free to modify, distribute, and use this code for any purpose.

Contribution:

If you'd like to contribute or fix bugs in this module, please create an issue on GitHub and follow the pull request guidelines.

I hope this example helps illustrate a simple Java module with basic math operations!

What is a module in Java with an example?

I'd be happy to explain modules in Java and provide an example!

In Java, a module is a group of related packages that can be compiled, loaded, and verified as a single unit. Modules are a way to structure and organize large-scale Java applications, making it easier to manage dependencies, reuse code, and promote modularity.

Java 9 (also known as Java SE 9) introduced modules as a new way to organize Java programs. Each module is represented by a declaration in a special file called the module-info.java file, which contains information about the module's name, its dependencies on other modules or JAR files, and any exported packages.

Here's an example of how to define a simple module:

Let's say we have a Java application that consists of two packages: com.example.util and com.example.main. We want to group these packages into a single module called myapp.

First, create a new directory for your project, let's call it myapp. Inside this directory, create the following files:

// myapp/module-info.java
module myapp {
exports com.example.util;
requires java.base;
}

// com/example/util/Utils.java
public class Utils {
public static void printHello() {
System.out.println("Hello from myapp!");
}
}

// com/example/main/Main.java
import com.example.util.Utils;
public class Main {
public static void main(String[] args) {
Utils.printHello();
}
}

Now, let's compile and run this module:

This will execute the Main class and print "Hello from myapp!" to the console.

In summary, modules in Java provide a way to organize related packages into a single unit that can be compiled, loaded, and verified as a whole. This promotes modularity, making it easier to develop and maintain large-scale applications.

Please note that this is a simplified example. In real-world scenarios, you may have more complex dependencies between modules, require specific configurations for different environments (e.g., production vs. development), or implement custom logging and monitoring.