Unit 1 Hax • 4 min read

Hax:

import java.util.Scanner;

public class DataTypeDemo {

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

    // Input for an integer
    int intValue;
    while (true) {
        System.out.print("Enter an integer: ");
        if (scanner.hasNextInt()) {
            intValue = scanner.nextInt();
            break; // Exit the loop if valid input
        } else {
            System.out.println("Invalid input! Please enter an integer.");
            scanner.nextLine(); // Clear the input buffer
        }
    }

    // Input for a double
    double doubleValue;
    while (true) {
        System.out.print("Enter a double: ");
        if (scanner.hasNextDouble()) {
            doubleValue = scanner.nextDouble();
            break; // Exit the loop if valid input
        } else {
            System.out.println("Invalid input! Please enter a double.");
            scanner.nextLine(); // Clear the input buffer
        }
    }

    // Input for a boolean
    boolean booleanValue;
    while (true) {
        System.out.print("Enter a boolean (true or false): ");
        if (scanner.hasNextBoolean()) {
            booleanValue = scanner.nextBoolean();
            break; // Exit the loop if valid input
        } else {
            System.out.println("Invalid input! Please enter 'true' or 'false'.");
            scanner.nextLine(); // Clear the input buffer
        }
    }

    // Input for a String
    System.out.print("Enter a string: ");
    String stringValue = scanner.next();

    // Output values and their types
    System.out.println("Integer Value: " + intValue);
    System.out.println("Double Value: " + doubleValue);
    System.out.println("Boolean Value: " + booleanValue);
    System.out.println("String Value: " + stringValue);

    // Perform an arithmetic expression with casting
    double convertedValue = (double) intValue;
    System.out.println("Casting Result: " + convertedValue);

    // Perform a compound assignment operator
    intValue += 5;
    System.out.println("After Compound Assignment: " + intValue);
} } DataTypeDemo.main(null);

Enter an integer: Enter a double: Enter a boolean (true or false): Enter a string: Integer Value: 5 Double Value: 2.0 Boolean Value: true String Value: Hello, Casting Result: 5.0 After Compound Assignment: 10