Page 327 - Computer_Science_F5

Computer Science Writing and running a simple program
When developing applications in Java, it is essential to start with a class name that
matches the filename. As a practice, let you create a simple program that prints
“Hello Tanzanians”. You can create your first Java file, named Tunalianzisha.java,
using any text editor like Notepad. The file should contain a greeting message:
FOR ONLINE READING ONLY
“Hello Tanzanians”.

Activity 5.7:

Writing a simple program-Hello Tanzanian

Aim:
To create a simple program that prints “Hello Tanzanians” to the console and
learn how to compile the Java program using Command Prompt.

Materials: Computers, text editors, Java Development Kit, Command prompt

Instructions:

Step 1: Open a text editor, Notepad
Step 2: Type the following code:
class Tunalianzisha {
public static void main(String[] args) {

System.out.println(“Hello Tanzanians”);
}
}
Step 3: Save your first program in a Notepad as “Tunalianzisha.java” at any
location.

Compiling a Java program:
Step 4: Open Command Prompt (cmd), write the path where you saved your file
then type “javac Main.java”:

(When you open the cmd.exe, it might come with default path like
C:\Users\admin> ; if you saved your file on the desktop, change the
directory to Desktop using Help “cd Desktop” as seen in the Figure 5.3.
Here, you are going to use the JDK compiler (called javac) to change
your text file in a notepad into an executable program.

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for Advanced Secondary Schools

Computer Science Form 5.indd 318 23/07/2024 12:34