solves #2490: Circular Sentence in java

Author: anishLearnsToCode

README.md

@@ -784,7 +784,7 @@
 | 2475 | [Number of Unequal Triplets in Array](https://leetcode.com/problems/number-of-unequal-triplets-in-array)                                                               |                                                                               [![Java](assets/java.png)](src/NumberOfUnequalTripletsInArray.java)                                                                                |                                                                                                                                   |
 | 2481 | [Minimum Cuts to Divide a Circle](https://leetcode.com/problems/minimum-cuts-to-divide-a-circle)                                                                       |                                                                                 [![Java](assets/java.png)](src/MinimumCutsToDivideACircle.java)                                                                                  |                                                                                                                                   |
 | 2485 | [Find the Pivot Integer](https://leetcode.com/problems/find-the-pivot-integer)                                                                                         |                                                                                     [![Java](assets/java.png)](src/FindThePivotInteger.java)                                                                                     |                                                                                                                                   |
-| 2490 | [Circular Sentence](https://leetcode.com/problems/circular-sentence)                                                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2490 | [Circular Sentence](https://leetcode.com/problems/circular-sentence)                                                                                                   |                                                                                      [![Java](assets/java.png)](src/CircularSentence.java)                                                                                       |                                                                                                                                   |
 | 2492 | [Minimum Score of a Path Between Two Cities](https://leetcode.com/problems/minimum-score-of-a-path-between-two-cities)                                                 |                                                                       [![Python](assets/python.png)](python/minimum_score_of_a_path_between_two_cities.py)                                                                       |                                                                                                                                   |
 | 2496 | [Maximum Value of a String in an Array](https://leetcode.com/problems/maximum-value-of-a-string-in-an-array)                                                           |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2500 | [Delete Greatest Value in Each Row](https://leetcode.com/problems/delete-greatest-value-in-each-row)                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/CircularSentence.java

@@ -0,0 +1,15 @@
+// https://leetcode.com/problems/circular-sentence
+// T: O(N)
+// S: O(1)
+
+public class CircularSentence {
+    public boolean isCircularSentence(String sentence) {
+        for (int index = 0 ; index < sentence.length() ; index++) {
+            char letter = sentence.charAt(index);
+            if (letter == ' ' && sentence.charAt(index - 1) != sentence.charAt(index + 1)) {
+                return false;
+            }
+        }
+        return sentence.charAt(0) == sentence.charAt(sentence.length() - 1);
+    }
+}