Merge pull request #1320 from faramarzaf/master

TemperatureUtils class added to the lib-subutil

lib/subutil/src/main/java/com/blankj/subutil/util/TemperatureUtils.java

+package com.blankj.subutil.util;
+
+/**
+ * Create by Faramarz Afzali on 2020/9/5
+ * <p>
+ * This class is intended for converting temperatures into different units.
+ * C refers to the Celsius unit
+ * F refers to the Fahrenheit unit
+ * K refers to the Kelvin unit
+ */
+
+public final class TemperatureUtils {
+
+
+    public static float cToF(float temp) {
+        return (temp * 9) / 5 + 32;
+    }
+
+    public static float cToK(float temp) {
+        return temp + 273.15f;
+    }
+
+
+    public static float fToC(float temp) {
+        return (temp - 32) * 5 / 9;
+    }
+
+    public static float fToK(float temp) {
+        return temp + 255.3722222222f;
+    }
+
+
+    public static float kToC(float temp) {
+        return temp - 273.15f;
+    }
+
+    public static float kToF(float temp) {
+        return temp - 459.67f;
+    }
+
+}

lib/subutil/src/test/java/com/blankj/subutil/util/TestTempConversion.java

+package com.blankj.subutil.util;
+
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/**
+ * Create by Faramarz Afzali on 2020/9/5
+ */
+
+
+@RunWith(JUnit4.class)
+public class TestTempConversion {
+
+    private float delta = 1e-15f;
+
+    @Test
+    public void testCToF() {
+        Assert.assertEquals(32f, TemperatureUtils.cToF(0f), delta);
+    }
+
+    @Test
+    public void testCToK() {
+        Assert.assertEquals(273.15f, TemperatureUtils.cToK(0f), delta);
+    }
+
+
+    @Test
+    public void testFToC() {
+        Assert.assertEquals(-17.777779f, TemperatureUtils.fToC(0f), delta);
+    }
+
+    @Test
+    public void testFToK() {
+        Assert.assertEquals(255.3722222222f, TemperatureUtils.fToK(0f), delta);
+    }
+
+
+    @Test
+    public void testKToC() {
+        Assert.assertEquals(-273.15f, TemperatureUtils.kToC(0f), delta);
+    }
+
+    @Test
+    public void testKToF() {
+        Assert.assertEquals(-459.67f, TemperatureUtils.kToF(0f), delta);
+    }
+
+}