refactor 342

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_342.java

@@ -5,8 +5,14 @@
  *
  * Given an integer (signed 32 bits), write a function to check whether it is a power of 4.
  *
- * Example:
- * Given num = 16, return true. Given num = 5, return false.
+ * Example 1:
+ * Input: 16
+ * Output: true
+ *
+ * Example 2:
+ * Input: 5
+ * Output: false
+ *
  * Follow up: Could you solve it without loops/recursion?
  * */
 public class _342 {