BAEL-8708 improve by adding min max abs (#17891)

Author: wynnteo

core-java-modules/core-java-collections-list/src/test/java/com/baeldung/java8/Java8MaxMinUnitTest.java

@@ -85,4 +85,25 @@ public void givenIntegerList_whenGetMinAndIndex_thenSuccess() {
         assertEquals(minValue, expectedMinValue);
         assertEquals(minIndex, expectedMinIndex);
     }
+
+    @Test
+    public void givenIntegerList_whenGetMinAbsolute_thenReturnMinAbsolute() {
+        List<Integer> numbers = Arrays.asList(-10, 3, -2, 8, 7);
+        int absMin = numbers.stream()
+            .min(Comparator.comparingInt(Math::abs))
+            .orElseThrow(NoSuchElementException::new);
+
+        assertEquals(-2, absMin);
+    }
+
+    @Test
+    public void givenIntegerList_whenGetMaxAbsolute_thenReturnMaxAbsolute() {
+        List<Integer> numbers = Arrays.asList(-10, 3, -2, 8, 7);
+        int absMax = numbers.stream()
+            .max(Comparator.comparingInt(Math::abs))
+            .orElseThrow(NoSuchElementException::new);
+
+        assertEquals(-10, absMax);
+    }
+
 }