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AdvancedConversions.java
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‎src/main/java/com/thealgorithms/conversions/AdvancedConversions.java‎

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import java.util.Scanner;
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// --- Base Interface for Conversions ---
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interface Convertible {
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void convert(Scanner scanner);
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}
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// --- Length Conversion Class ---
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class LengthConverter implements Convertible {
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public void convert(Scanner scanner) {
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System.out.println("--- LENGTH CONVERSION ---");
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System.out.println("1. Centimeters to Meters");
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System.out.println("2. Meters to Centimeters");
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System.out.println("3. Meters to Feet");
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System.out.println("4. Feet to Meters");
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System.out.print("Choose conversion: ");
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int choice = scanner.nextInt();
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System.out.print("Enter value: ");
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double value = scanner.nextDouble();
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double result;
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switch (choice) {
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case 1:
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result = value / 100;
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System.out.println(value + " cm = " + result + " m");
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break;
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case 2:
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result = value * 100;
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System.out.println(value + " m = " + result + " cm");
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break;
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case 3:
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result = value * 3.28084;
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System.out.println(value + " m = " + result + " ft");
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break;
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case 4:
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result = value / 3.28084;
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System.out.println(value + " ft = " + result + " m");
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break;
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default:
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System.out.println("Invalid choice!");
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}
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}
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}
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// --- Weight Conversion Class ---
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class WeightConverter implements Convertible {
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public void convert(Scanner scanner) {
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System.out.println("--- WEIGHT CONVERSION ---");
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System.out.println("1. Grams to Kilograms");
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System.out.println("2. Kilograms to Grams");
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System.out.println("3. Kilograms to Pounds");
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System.out.println("4. Pounds to Kilograms");
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System.out.print("Choose conversion: ");
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int choice = scanner.nextInt();
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System.out.print("Enter value: ");
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double value = scanner.nextDouble();
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double result;
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switch (choice) {
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case 1:
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result = value / 1000;
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System.out.println(value + " g = " + result + " kg");
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break;
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case 2:
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result = value * 1000;
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System.out.println(value + " kg = " + result + " g");
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break;
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case 3:
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result = value * 2.20462;
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System.out.println(value + " kg = " + result + " lb");
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break;
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case 4:
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result = value / 2.20462;
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System.out.println(value + " lb = " + result + " kg");
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break;
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default:
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System.out.println("Invalid choice!");
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}
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}
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}
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// --- Temperature Conversion Class ---
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class TemperatureConverter implements Convertible {
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public void convert(Scanner scanner) {
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System.out.println("--- TEMPERATURE CONVERSION ---");
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System.out.println("1. Celsius to Fahrenheit");
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System.out.println("2. Fahrenheit to Celsius");
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System.out.println("3. Celsius to Kelvin");
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System.out.println("4. Kelvin to Celsius");
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System.out.print("Choose conversion: ");
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int choice = scanner.nextInt();
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System.out.print("Enter temperature: ");
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double value = scanner.nextDouble();
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double result;
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switch (choice) {
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case 1:
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result = (value * 9 / 5) + 32;
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System.out.println(value + " °C = " + result + " °F");
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break;
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case 2:
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result = (value - 32) * 5 / 9;
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System.out.println(value + " °F = " + result + " °C");
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break;
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case 3:
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result = value + 273.15;
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System.out.println(value + " °C = " + result + " K");
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break;
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case 4:
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result = value - 273.15;
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System.out.println(value + " K = " + result + " °C");
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break;
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default:
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System.out.println("Invalid choice!");
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}
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}
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}
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// --- Currency Conversion Class ---
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class CurrencyConverter implements Convertible {
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public void convert(Scanner scanner) {
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System.out.println("--- CURRENCY CONVERSION ---");
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System.out.println("1. USD to GBP");
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System.out.println("2. GBP to USD");
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System.out.println("3. USD to JPY");
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System.out.println("4. JPY to USD");
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System.out.print("Choose conversion: ");
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int choice = scanner.nextInt();
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System.out.print("Enter amount: ");
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double value = scanner.nextDouble();
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double result;
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// Example static rates
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double usdToGbp = 0.78;
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double gbpToUsd = 1.28;
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double usdToJpy = 150.35;
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double jpyToUsd = 1 / 150.35;
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switch (choice) {
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case 1:
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result = value * usdToGbp;
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System.out.println(value + " USD = " + result + " GBP");
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break;
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case 2:
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result = value * gbpToUsd;
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System.out.println(value + " GBP = " + result + " USD");
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break;
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case 3:
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result = value * usdToJpy;
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System.out.println(value + " USD = " + result + " JPY");
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break;
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case 4:
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result = value * jpyToUsd;
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System.out.println(value + " JPY = " + result + " USD");
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break;
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default:
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System.out.println("Invalid choice!");
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}
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}
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}
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// --- Main Program ---
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public class AdvancedConversions {
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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Convertible converter;
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int choice;
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do {
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System.out.println("===== ADVANCED CONVERSIONS =====");
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System.out.println("1. Length Converter");
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System.out.println("2. Weight Converter");
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System.out.println("3. Temperature Converter");
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System.out.println("4. Currency Converter");
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System.out.println("0. Exit");
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System.out.print("Choose converter: ");
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choice = scanner.nextInt();
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switch (choice) {
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case 1:
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converter = new LengthConverter();
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converter.convert(scanner);
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break;
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case 2:
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converter = new WeightConverter();
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converter.convert(scanner);
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break;
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case 3:
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converter = new TemperatureConverter();
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converter.convert(scanner);
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break;
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case 4:
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converter = new CurrencyConverter();
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converter.convert(scanner);
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break;
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case 0:
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System.out.println("Thank you for using the converter. Goodbye!");
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break;
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default:
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System.out.println("Invalid option!");
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}
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System.out.println();
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} while (choice != 0);
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scanner.close();
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}
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}

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