Added Sliding Window: Maximum Sum Subarray of Size K

Author: nihalsingh373

src/main/java/com/thealgorithms/datastructures/bloomfilter/BloomFilter.java

@@ -15,7 +15,7 @@
  *
  * @param <T> The type of elements to be stored in the Bloom filter.
  */
-@SuppressWarnings("rawtypes")
+
 public class BloomFilter<T> {
 
     private final int numberOfHashFunctions;

src/main/java/com/thealgorithms/slidingwindow/MaximumSumSubarrayOfSizeK.java

@@ -0,0 +1,45 @@
+package com.thealgorithms.slidingwindow;
+
+/**
+ * Problem: Find the maximum sum of any contiguous subarray of size K
+ * Approach: Sliding Window
+ * Time Complexity: O(n)
+ * Space Complexity: O(1)
+ */
+public class MaximumSumSubarrayOfSizeK {
+
+    /**
+     * Returns the maximum sum of any contiguous subarray of size k.
+     *
+     * @param arr input array
+     * @param k   window size
+     * @return maximum sum of subarray of size k
+     * @throws IllegalArgumentException if k <= 0 or arr length < k
+     */
+    public static int maxSumSubarray(int[] arr, int k) {
+        if (arr == null || arr.length < k || k <= 0) {
+            throw new IllegalArgumentException("Invalid input");
+        }
+
+        int windowSum = 0;
+        for (int i = 0; i < k; i++) {
+            windowSum += arr[i];
+        }
+
+        int maxSum = windowSum;
+
+        for (int end = k; end < arr.length; end++) {
+            windowSum += arr[end] - arr[end - k];
+            maxSum = Math.max(maxSum, windowSum);
+        }
+
+        return maxSum;
+    }
+
+    // Example test
+    public static void main(String[] args) {
+        int[] arr = {2, 1, 5, 1, 3, 2};
+        int k = 3;
+        System.out.println("Max sum of subarray of size " + k + " = " + maxSumSubarray(arr, k));
+    }
+}