solves #2716: Minimize String Length in java

Author: anishLearnsToCode

Diff for: README.txt

@@ -826,8 +826,8 @@
 | 2696 | [Minimum String Length After Removing Substrings](https://leetcode.com/problems/minimum-string-length-after-removing-substrings)                                       |                                                                                   [![Java](assets/java.png)](src/MinimumStringLengthAfterRemovingSubstrings.java)                                                                |                                                                                                                                   |
 | 2697 | [Lexicographically Smallest Palindrome](https://leetcode.com/problems/lexicographically-smallest-palindrome)                                                           |                                                                                   [![Java](assets/java.png)](src/LexicographicallySmallestPalindrome.java)                                                                       |                                                                                                                                   |
 | 2706 | [Buy Two Chocolates](https://leetcode.com/problems/buy-two-chocolates)                                                                                                 |                                                                                   [![Java](assets/java.png)](src/BuyTwoChocolates.java)                                                                                          |                                                                                                                                   |
-| 2710 | [Remove Trailing Zeros From a String](https://leetcode.com/problems/remove-trailing-zeros-from-a-string)                                                               |                                                                                   [![Java](assets/java.png)](src/RemoveTrailingZerosFromAString.java)                                                                                                                                               |                                                                                                                                   |
-| 2716 | [Minimize String Length](https://leetcode.com/problems/minimize-string-length)                                                                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2710 | [Remove Trailing Zeros From a String](https://leetcode.com/problems/remove-trailing-zeros-from-a-string)                                                               |                                                                                   [![Java](assets/java.png)](src/RemoveTrailingZerosFromAString.java)                                                                            |                                                                                                                                   |
+| 2716 | [Minimize String Length](https://leetcode.com/problems/minimize-string-length)                                                                                         |                                                                                   [![Java](assets/java.png)](src/MinimizeStringLength.java)                                                                                      |                                                                                                                                   |
 | 2717 | [Semi-Ordered Permutation](https://leetcode.com/problems/semi-ordered-permutation)                                                                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2728 | [Count Houses in a Circular Street](https://leetcode.com/problems/count-houses-in-a-circular-street)                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2729 | [Check if The Number is Fascinating](https://leetcode.com/problems/check-if-the-number-is-fascinating)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |

Diff for: src/MinimizeStringLength.java

@@ -0,0 +1,16 @@
+// https://leetcode.com/problems/minimize-string-length
+// T: O(N)
+// S: O(1)
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class MinimizeStringLength {
+    public int minimizedStringLength(String s) {
+        final Set<Character> letters = new HashSet<>();
+        for (int i = 0 ; i < s.length() ; i++) {
+            letters.add(s.charAt(i));
+        }
+        return letters.size();
+    }
+}