improvement of the article "How to Return Multiple Values From a Java Method"

core-java-modules/core-java-lang-2/src/test/java/com/baeldung/methodmultiplereturnvalues/MultipleReturnValuesUsingApacheCommonsPairUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.methodmultiplereturnvalues;
+
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class MultipleReturnValuesUsingApacheCommonsPairUnitTest {
+
+    @Test
+    void whenUsingPair_thenMultipleFieldsAreReturned() {
+
+        List<Coordinates> coordinatesList = new ArrayList<>();
+        coordinatesList.add(new Coordinates(1, 1, "home"));
+        coordinatesList.add(new Coordinates(2, 2, "school"));
+        coordinatesList.add(new Coordinates(3, 3, "hotel"));
+
+        Coordinates target = new Coordinates(5, 5, "gym");
+
+        ImmutablePair<Coordinates, Double> mostDistantPoint = MultipleReturnValuesUsingApacheCommonsPair.getMostDistantPoint(coordinatesList, target);
+
+        assertEquals(1, mostDistantPoint.getLeft().getLongitude());
+        assertEquals(1, mostDistantPoint.getLeft().getLatitude());
+        assertEquals("home", mostDistantPoint.getLeft().getPlaceName());
+        assertEquals(5.66, BigDecimal.valueOf(mostDistantPoint.getRight()).setScale(2, RoundingMode.HALF_UP).doubleValue());
+
+    }
+
+}

core-java-modules/core-java-lang-2/src/test/java/com/baeldung/methodmultiplereturnvalues/MultipleReturnValuesUsingApacheCommonsTripleUnitTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.methodmultiplereturnvalues;
+
+import org.apache.commons.lang3.tuple.ImmutableTriple;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class MultipleReturnValuesUsingApacheCommonsTripleUnitTest {
+
+    @Test
+    void whenUsingTriple_thenMultipleFieldsAreReturned() {
+
+        List<Coordinates> coordinatesList = new ArrayList<>();
+        coordinatesList.add(new Coordinates(1, 1, "home"));
+        coordinatesList.add(new Coordinates(2, 2, "school"));
+        coordinatesList.add(new Coordinates(3, 3, "hotel"));
+
+        Coordinates target = new Coordinates(5, 5, "gym");
+
+        ImmutableTriple<Double, Double, Double> minAvgMax = MultipleReturnValuesUsingApacheCommonsTriple.getMinAvgMaxTriple(coordinatesList, target);
+
+        assertEquals(2.83, scaleDouble(minAvgMax.left));   //min
+        assertEquals(4.24, scaleDouble(minAvgMax.middle)); //avg
+        assertEquals(5.66, scaleDouble(minAvgMax.right));  //max
+    }
+
+    private double scaleDouble(Double d) {
+        return BigDecimal.valueOf(d).setScale(2, RoundingMode.HALF_UP).doubleValue();
+    }
+}