Step 1: Writing the Java Program

• Create a Folder for Your Java Programs
  1. Open File Explorer.
  2. Go to a location like Documents or Desktop.
  3. Right-click → Select New > Folder.
  4. Name it JavaProjects (or any name you like).

• Write Your Java Program
  1. Open Notepad (or any text editor like VS Code or Notepad++).
  2. Type the following Java code:

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

What’s happening in the code?

• class MyFirstProgram {} → This defines a class named MyFirstProgram.
• public static void main(String args[]) {} → This is the starting point of every Java program. (Don’t worry about the details yet we will learn in future lessons)
• System.out.println("Hello, Java!"); → This prints the text “Hello, Java!” on the screen. (We will talk about print statements in the next slide)

• Save the File in Your Folder
  1. Click File > Save As.
  2. In the JavaProjects folder, change “Save as type” to All Files.
  3. Name the file MyFirstProgram.java (Make sure the filename matches the class name!)
  4. Click Save.

The name of the file must be the same as the class name (MyFirstProgram) inside the code. If the names don’t match, Java will give an error.

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

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