BAEL-7108: Comparing Arrays Using compare() Method in Java (#14975)

core-java-modules/core-java-arrays-operations-advanced/pom.xml

@@ -58,4 +58,8 @@
         </plugins>
     </build>
     
+    <properties>
+        <maven.compiler.release>11</maven.compiler.release>
+    </properties>
+
 </project>

core-java-modules/core-java-arrays-operations-advanced/src/test/java/com/baeldung/arraycompare/ArraysCompareUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.arraycompare;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Arrays;
+
+import org.junit.jupiter.api.Test;
+
+class ArraysCompareUnitTest {
+
+    @Test
+    void givenSameContents_whenCompare_thenCorrect() {
+        String[] array1 = new String[] { "A", "B", "C" };
+        String[] array2 = new String[] { "A", "B", "C" };
+
+        assertThat(Arrays.compare(array1, array2)).isEqualTo(0);
+    }
+
+    @Test
+    void givenDifferentContents_whenCompare_thenDifferent() {
+        String[] array1 = new String[] { "A", "B", "C" };
+        String[] array2 = new String[] { "A", "C", "B", "D" };
+
+        assertThat(Arrays.compare(array1, array2)).isLessThan(0);
+        assertThat(Arrays.compare(array2, array1)).isGreaterThan(0);
+        assertThat(Arrays.compare(array1, null)).isGreaterThan(0);
+    }
+
+}