Merge pull request doocs#202 from egnaf/bit-count-java

Add Java Solution for Problem 191

Author: yanglbme

solution/0191.Number of 1 Bits/Solution.java

@@ -0,0 +1,5 @@
+public class Solution {
+    public int hammingWeight(int n) {
+        return Integer.bitCount(n);
+    }
+}

solution/README.md

@@ -658,6 +658,7 @@
 │   ├── Solution.js
 │   └── Solution.py
 ├── 0191.Number of 1 Bits
+│   ├── Solution.java
 │   ├── Solution.js
 │   └── Solution.py
 ├── 0196.Delete Duplicate Emails