Creating First Java Application in IntelliJ IDEA

IntelliJ IDEA is one of the most popular Integrated Development Environments (IDE) used for Java development. It provides features like code completion, debugging, refactoring, and project management that make Java programming easier and faster. IntelliJ IDEA supports programming languages such as Java, Kotlin, Scala, and Groovy.

Provides smart code completion and debugging tools.
Helps in project management and JAR file creation.
Available for Windows, Linux, and macOS platforms.

Procedure

Start a project
Create a package and Java class
Write and run the Java program
Package the project into a JAR file
Configure the JAR application
Execute the JAR file

Step-by-Step Implementation of First Java Application

Step 1: Start a New Project

Open IntelliJ IDEA.
Click on New Project from the welcome screen.

Name the project as 'GeeksForGeeks' (you can choose any name), and then click finish.

Step 2: Create a Package and Java Class

In the Project window, right-click the src folder and select New -> Package.
Enter the package name, for example, gfg.
Right-click the gfg package and select New -> Java Class.
Enter the class name, for example, GeeksForGeeks.

The GeeksForGeeks.java class will now be created inside the gfg package.

Step 3: Write the Java Program

Write the following Java program inside the class file:

Example: Java demo program to print message on the console

Java

import java.io.*;

// Class
public class Geeksforgeeks {

    // Main driver method
    public static void main(String[] args)
    {
        // Print and display on the console after
        // successful compilation and execution
        System.out.println(
            "This is my first project in java");
    }
}