Initial data commit

Task/Averages-Median/Java/averages-median-1.java

@@ -0,0 +1,16 @@
+double median(List<Double> values) {
+    /* copy, as to prevent modifying 'values' */
+    List<Double> list = new ArrayList<>(values);
+    Collections.sort(list);
+    /* 'mid' will be truncated */
+    int mid = list.size() / 2;
+    return switch (list.size() % 2) {
+        case 0 -> {
+            double valueA = list.get(mid);
+            double valueB = list.get(mid + 1);
+            yield (valueA + valueB) / 2;
+        }
+        case 1 -> list.get(mid);
+        default -> 0;
+    };
+}