diff --git a/src/main/java/com/thealgorithms/maths/Median.java b/src/main/java/com/thealgorithms/maths/Median.java
index e4daec8fc11a..fd2aab84e4e9 100644
--- a/src/main/java/com/thealgorithms/maths/Median.java
+++ b/src/main/java/com/thealgorithms/maths/Median.java
@@ -13,8 +13,13 @@ private Median() {
* Calculate average median
* @param values sorted numbers to find median of
* @return median of given {@code values}
+ * @throws IllegalArgumentException If the input array is empty or null.
*/
public static double median(int[] values) {
+ if (values == null || values.length == 0) {
+ throw new IllegalArgumentException("Values array cannot be empty or null");
+ }
+
Arrays.sort(values);
int length = values.length;
return length % 2 == 0 ? (values[length / 2] + values[length / 2 - 1]) / 2.0 : values[length / 2];
diff --git a/src/test/java/com/thealgorithms/maths/MedianTest.java b/src/test/java/com/thealgorithms/maths/MedianTest.java
index d2b637abd3cb..560feb695792 100644
--- a/src/test/java/com/thealgorithms/maths/MedianTest.java
+++ b/src/test/java/com/thealgorithms/maths/MedianTest.java
@@ -1,6 +1,7 @@
package com.thealgorithms.maths;
import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.api.Test;
@@ -34,4 +35,10 @@ void medianNegativeValues() {
int[] arr = {-27, -16, -7, -4, -2, -1};
assertEquals(-5.5, Median.median(arr));
}
+
+ @Test
+ void medianEmptyArrayThrows() {
+ int[] arr = {};
+ assertThrows(IllegalArgumentException.class, () -> Median.median(arr));
+ }
}
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