java: add «2419. Longest Subarray With Maximum Bitwise AND»

Signed-off-by: Matej Focko <me@mfocko.xyz>

java/longest-subarray-with-maximum-bitwise-and.java

@@ -0,0 +1,25 @@
+class Solution {
+  public int longestSubarray(int[] nums) {
+    int maximum = 0;
+
+    int longest = 0, current = 0;
+    for (var num : nums) {
+      if (maximum < num) {
+        maximum = num;
+        longest = current = 1;
+
+        continue;
+      }
+
+      if (num == maximum) {
+        ++current;
+      } else {
+        current = 0;
+      }
+
+      longest = Math.max(longest, current);
+    }
+
+    return longest;
+  }
+}