diff --git a/src/main/java/com/thealgorithms/conversions/TemperatureConverter.java b/src/main/java/com/thealgorithms/conversions/TemperatureConverter.java new file mode 100644 index 000000000000..901db17c665d --- /dev/null +++ b/src/main/java/com/thealgorithms/conversions/TemperatureConverter.java @@ -0,0 +1,46 @@ +package com.thealgorithms.conversions; + +/** + * A utility class to convert between different temperature units. + * + *
This class supports conversions between the following units: + *
This class is final and cannot be instantiated. + * + * @author krishna-medapati (https://github.com/krishna-medapati) + * @see Wikipedia: Temperature Conversion + */ +public final class TemperatureConverter { + + private TemperatureConverter() { + } + + public static double celsiusToFahrenheit(double celsius) { + return celsius * 9.0 / 5.0 + 32.0; + } + + public static double celsiusToKelvin(double celsius) { + return celsius + 273.15; + } + + public static double fahrenheitToCelsius(double fahrenheit) { + return (fahrenheit - 32.0) * 5.0 / 9.0; + } + + public static double fahrenheitToKelvin(double fahrenheit) { + return (fahrenheit - 32.0) * 5.0 / 9.0 + 273.15; + } + + public static double kelvinToCelsius(double kelvin) { + return kelvin - 273.15; + } + + public static double kelvinToFahrenheit(double kelvin) { + return (kelvin - 273.15) * 9.0 / 5.0 + 32.0; + } +} diff --git a/src/test/java/com/thealgorithms/conversions/TemperatureConverterTest.java b/src/test/java/com/thealgorithms/conversions/TemperatureConverterTest.java new file mode 100644 index 000000000000..24d55b706f36 --- /dev/null +++ b/src/test/java/com/thealgorithms/conversions/TemperatureConverterTest.java @@ -0,0 +1,54 @@ +package com.thealgorithms.conversions; + +import static org.junit.jupiter.api.Assertions.assertEquals; + +import org.junit.jupiter.api.Test; + +class TemperatureConverterTest { + + private static final double DELTA = 0.01; + + @Test + void testCelsiusToFahrenheit() { + assertEquals(32.0, TemperatureConverter.celsiusToFahrenheit(0.0), DELTA); + assertEquals(212.0, TemperatureConverter.celsiusToFahrenheit(100.0), DELTA); + assertEquals(-40.0, TemperatureConverter.celsiusToFahrenheit(-40.0), DELTA); + assertEquals(98.6, TemperatureConverter.celsiusToFahrenheit(37.0), DELTA); + } + + @Test + void testCelsiusToKelvin() { + assertEquals(273.15, TemperatureConverter.celsiusToKelvin(0.0), DELTA); + assertEquals(373.15, TemperatureConverter.celsiusToKelvin(100.0), DELTA); + assertEquals(233.15, TemperatureConverter.celsiusToKelvin(-40.0), DELTA); + } + + @Test + void testFahrenheitToCelsius() { + assertEquals(0.0, TemperatureConverter.fahrenheitToCelsius(32.0), DELTA); + assertEquals(100.0, TemperatureConverter.fahrenheitToCelsius(212.0), DELTA); + assertEquals(-40.0, TemperatureConverter.fahrenheitToCelsius(-40.0), DELTA); + assertEquals(37.0, TemperatureConverter.fahrenheitToCelsius(98.6), DELTA); + } + + @Test + void testFahrenheitToKelvin() { + assertEquals(273.15, TemperatureConverter.fahrenheitToKelvin(32.0), DELTA); + assertEquals(373.15, TemperatureConverter.fahrenheitToKelvin(212.0), DELTA); + assertEquals(233.15, TemperatureConverter.fahrenheitToKelvin(-40.0), DELTA); + } + + @Test + void testKelvinToCelsius() { + assertEquals(0.0, TemperatureConverter.kelvinToCelsius(273.15), DELTA); + assertEquals(100.0, TemperatureConverter.kelvinToCelsius(373.15), DELTA); + assertEquals(-273.15, TemperatureConverter.kelvinToCelsius(0.0), DELTA); + } + + @Test + void testKelvinToFahrenheit() { + assertEquals(32.0, TemperatureConverter.kelvinToFahrenheit(273.15), DELTA); + assertEquals(212.0, TemperatureConverter.kelvinToFahrenheit(373.15), DELTA); + assertEquals(-40.0, TemperatureConverter.kelvinToFahrenheit(233.15), DELTA); + } +}