solves alternating characters

Author: anishLearnsToCode

README.md

@@ -154,8 +154,8 @@ I have also solved other domains on HackerRank that can be viewed at:
 | [Weighted Uniform Strings](https://www.hackerrank.com/challenges/weighted-uniform-string) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/WeightedUniformStrings.java) |
 | [Separate The Numbers](https://www.hackerrank.com/challenges/separate-the-numbers) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/SeparateTheNumbers.java) |
 | [Funny String](https://www.hackerrank.com/challenges/funny-string) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/FunnyString.java) |
-| [Gemstones](https://www.hackerrank.com/challenges/gem-stones) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)]() https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/Gemstones.java|
-| [Alternating Characters](https://www.hackerrank.com/challenges/alternating-characters) | Easy | |
+| [Gemstones](https://www.hackerrank.com/challenges/gem-stones) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/Gemstones.java) |
+| [Alternating Characters](https://www.hackerrank.com/challenges/alternating-characters) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/hackerrank-algorithms/blob/master/src/strings/AlternatingCharacters.java) |
 | [Beautiful Binary String](https://www.hackerrank.com/challenges/beautiful-binary-string) | Easy | |
 | [The Love-Letter Mysetry](https://www.hackerrank.com/challenges/the-love-letter-mystery) | Easy | |
 | [Palindromic Index](https://www.hackerrank.com/challenges/palindrome-index) | Easy | |