Added Java solution

Author: Natanel-Ziv

Diff for: solution/0190.Reverse Bits/Solution.java

@@ -0,0 +1,11 @@
+public class Solution {
+    // you need treat n as an unsigned value
+    public int reverseBits(int n) {
+        int res = 0;
+        for (int i = 0; i < 31; i++, n>>=1, res<<=1) {
+            res |= (n&1);
+        }
+        res |= (n&1);
+        return res;
+    }
+}