by JAVA Hello World Program Step by steps. Hello! I’d be happy to guide you through creating a simple Java program step by step. Let’s create a program that prints “Hello, World!” to the console.
Step 1: Prepare Your Development Environment
Ensure that you have the Java Development Kit (JDK) properly installed on your computer.. You can download it from Oracle’s website or use OpenJDK.
Step 2: Write the Java Code
Open a text editor or an Integrated Development Environment (IDE) like IntelliJ IDEA, Eclipse, or Visual Studio Code.
Create a new file named HelloWorld.java. Java files must have the same name as the public class they contain.
Step 3: Write the Java Code
Inside HelloWorld.java, write the following Java code:
//Simple Java Program HelloWorld..
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}Step 4: Save the File
Save HelloWorld.java.
Step 5: Compile the Java Program
Open your command prompt or terminal and navigate to the directory where HelloWorld.java is saved.
Compile the program by typing:
javac HelloWorld.javaThis will compile HelloWorld.java into bytecode, producing a HelloWorld.class file.
Step 6: Run the Java Program
After successfully compiling, run the program by typing:
java HelloWorldStep 7: Output
Output in your terminal:
Hello, World!Explanation
finalkeyword is added, indicating that the class cannot be subclassed.- The class is still declared as
public, allowing it to be accessed from other classes.
Adding final ensures that the class HelloWorld cannot have any subclasses, making it effectively a terminal class in terms of inheritance.
- Main Method:
public static void main(String[] args)is the entry point of any Java program. It’s where the program starts executing. - Printing to Console:
System.out.println("Hello, World!");prints the output “Hello, World!” followed by a new-line to the console.
Additional Tips
- Make sure your JDK is properly installed and configured.
- Always use
javacto compile andjavato run Java programs. - Understand the basic syntax rules of Java, such as using semicolons at the end of statements, curly braces for defining blocks of code, etc.
