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Java Programming Lab Workbook

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To download the Java Development Kit (JDK), you can visit the official Java website or the Oracle website. Here are the steps to download the JDK:

1. Visit the Java Archive Downloads page on the Oracle website. 2. Choose the appropriate version of the JDK you need, such as Java SE 11 or Java SE 17. 3. Select the download link for your specific operating system (Windows, Mac, Linux, etc.). 4. The JDK is a development environment for building applications using the Java programming language[1][2].
Alternatively, you can also visit the Oracle website at [oracle.com/java/technologies/downloads](https://www.oracle.com/java/technologies/downloads/) to download the latest Java LTS, which includes the Java SE Platform and the JDK[4][5].
It's important to choose the JDK package that best suits your development needs and preferences, such as the specific version and the operating system you are using.
Citations: [1] https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html [2] https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html [3] https://www.java.com/en/download/manual.jsp [4] https://www.oracle.com/java/technologies/downloads/ [5] https://www.oracle.com/java/technologies/javase/jdk21-archive-downloads.html

You can download Microsoft Visual Studio Code from the official website

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code.visualstudio.com/download
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. Visual Studio Code is available for various platforms, including Windows, macOS, and Linux. It is a free, lightweight, and extensible code editor that supports a wide range of programming languages. Once you have downloaded the installer for your specific operating system, you can run it to install Visual Studio Code on your machine
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If you are a Windows user, you can also download the Visual Studio Code installer for Windows from the official website at
code.visualstudio.com/docs/setup/windows
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. The installation process is straightforward and only takes a few minutes. Additionally, you can choose to download a Zip archive, extract it, and run Visual Studio Code from there
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Furthermore, you can find Visual Studio Code on the Microsoft Store at
apps.microsoft.com/detail/XP9KHM4BK9FZ7Q
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. This allows for a convenient installation directly from the Microsoft Store
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Here are five simple Java programming drill programs along with explanations and sample code :

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Drill 1: Hello World

Objective:

To introduce basic Java syntax and printing to the console.

Instructions:

Write a Java program that prints "Hello, World!" to the console.
javaCopy code
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}

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Drill 2: Simple Calculator

Objective:

To practice basic arithmetic operations and user input.

Instructions:

Write a Java program that takes two numbers as input from the user and performs addition, subtraction, multiplication, and division, displaying the results.
javaCopy code
import java.util.Scanner;

public class SimpleCalculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter the first number: ");
double num1 = scanner.nextDouble();

System.out.print("Enter the second number: ");
double num2 = scanner.nextDouble();

double sum = num1 + num2;
double difference = num1 - num2;
double product = num1 * num2;
double quotient = num1 / num2;

System.out.println("Sum: " + sum);
System.out.println("Difference: " + difference);
System.out.println("Product: " + product);
System.out.println("Quotient: " + quotient);

scanner.close();
}
}

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Drill 3: Factorial Calculator

Objective:

To practice loops and conditional statements.

Instructions:

Write a Java program that calculates the factorial of a given number using a for loop.
javaCopy code
import java.util.Scanner;

public class FactorialCalculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter a positive integer: ");
int n = scanner.nextInt();

long factorial = 1;

if (n < 0) {
System.out.println("Factorial is not defined for negative numbers.");
} else {
for (int i = 1; i <= n; i++) {
factorial *= i;
}
System.out.println("Factorial of " + n + " is " + factorial);
}

scanner.close();
}
}

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Drill 4: Guess the Number

Objective:

To introduce random number generation and user interaction.

Instructions:

Write a Java program that generates a random number between 1 and 100 and asks the user to guess it. Provide hints if the guess is too high or too low, and keep track of the number of attempts until the user guesses correctly.
javaCopy code
import java.util.Random;
import java.util.Scanner;

public class GuessTheNumber {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
Random random = new Random();

int secretNumber = random.nextInt(100) + 1;
int attempts = 0;
int guess = 0;

System.out.println("Guess the secret number between 1 and 100.");

while (guess != secretNumber) {
System.out.print("Enter your guess: ");
guess = scanner.nextInt();
attempts++;

if (guess < secretNumber) {
System.out.println("Too low! Try again.");
} else if (guess > secretNumber) {
System.out.println("Too high! Try again.");
}
}

System.out.println("Congratulations! You guessed the number in " + attempts + " attempts.");

scanner.close();
}
}

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Drill 5: Palindrome Checker

Objective:

To practice string manipulation and conditionals.

Instructions:

Write a Java program that checks if a given string is a palindrome (reads the same forwards and backwards).
javaCopy code
import java.util.Scanner;

public class PalindromeChecker {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter a string: ");
String input = scanner.nextLine();

String reversed = new StringBuilder(input).reverse().toString();

if (input.equalsIgnoreCase(reversed)) {
System.out.println(input + " is a palindrome.");
} else {
System.out.println(input + " is not a palindrome.");
}

scanner.close();
}
}

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