XOR to get diff; bitCount() or Iterative x &=(x-1)

Author: GuanhuiGuan

Hamming Distance.java

@@ -0,0 +1,16 @@
+class Solution {
+    public int hammingDistance(int x, int y) {
+        return Integer.bitCount(x ^ y);
+        // return selfBitCount(x, y);
+    }
+    
+    public int selfBitCount(int x, int y) {
+        int dif = x ^ y;
+        int res = 0;
+        while(dif > 0) {
+            dif &= dif - 1;
+            res++;
+        }
+        return res;
+    }
+}