How to create a simple program with java

5 lug 2023 1 min di lettura
How to create a simple program with java
Indice dei contenuti


Java is an object-oriented programming language used to develop web, mobile and desktop applications. Here, we'll look at how to create a simple "Hello, World!" in Java.

Step 1: Installing the Java Development Environment (JDK)

Before you can start coding Java, you need to install the Java Development Kit (JDK) on your computer. You can download the latest JDK from Oracle's official website.

Step 2: Creating a new Java file

Once the JDK is installed, you can create a new Java file. To do this, open a text editor (like Notepad or Sublime Text), and save the file with the ".java" extension. For example, you could name it "".

Step 3: Write the Java code

Write the following code in your Java file:

public class HelloWorld {
 public static void main(String[] args) {
 System.out.println("Hello, World!");

This is a simple Java program that prints the phrase "Hello, World!".

  • public class HelloWorld: This is the declaration of the class. Every Java program starts with a class.
  • public static void main(String[] args): This is the main method. Java starts program execution from this method.
  • System.out.println("Hello, World!");: This is a command that prints the phrase "Hello, World!" in the console.

Step 4: Compiling and running the program

To compile and run the program, open a terminal or command prompt and navigate to the directory where you saved the file.

Compile the program with the javac command:


If the code contains no errors, this command will create a new file called "HelloWorld.class".

To run the program, use the java command:

java HelloWorld

You will see the phrase "Hello, World!" printed in the console. This means you have successfully created your first Java program!


Remember, practice is the key to becoming fluent in any programming language. Keep practicing by writing and experimenting with different types of programs in Java.

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