solves #3127: Make a Square with the Same Color in java

Author: anishLearnsToCode

README.md

@@ -906,7 +906,7 @@
 | 3110 | [Score of a String](https://leetcode.com/problems/score-of-a-string)                                                                                                   |                                                                                       [![Java](assets/java.png)](src/ScoreOfAString.java)                                                                                        |                                                                                                                                   |
 | 3114 | [Latest Time You Can Obtain After Replacing Characters](https://leetcode.com/problems/latest-time-you-can-obtain-after-replacing-characters)                           |                                                                       [![Java](assets/java.png)](src/LatestTimeYouCanObtainAfterReplacingCharacters.java)                                                                        |                                                                                                                                   |
 | 3120 | [Count the Number of Special Characters I](https://leetcode.com/problems/count-the-number-of-special-characters-i)                                                     |                                                                             [![Java](assets/java.png)](src/CountTheNumberOfSpecialCharactersI.java)                                                                              |                                                                                                                                   |
-| 3127 | [Make a Square with the Same Color](https://leetcode.com/problems/make-a-square-with-the-same-color)                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 3127 | [Make a Square with the Same Color](https://leetcode.com/problems/make-a-square-with-the-same-color)                                                                   |                                                                                 [![Java](assets/java.png)](src/MakeASquareWithTheSameColor.java)                                                                                 |                                                                                                                                   |
 | 3131 | [Find the Integer Added to Array I](https://leetcode.com/problems/find-the-integer-added-to-array-i)                                                                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3136 | [Valid Word](https://leetcode.com/problems/valid-word)                                                                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 3142 | [Check if Grid Satisfies Conditions](https://leetcode.com/problems/check-if-grid-satisfies-conditions)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/MakeASquareWithTheSameColor.java

@@ -0,0 +1,33 @@
+// https://leetcode.com/problems/make-a-square-with-the-same-color
+// T: O(1)
+// S: O(1)
+
+public class MakeASquareWithTheSameColor {
+    public boolean canMakeSquare(char[][] grid) {
+        for (int i = 0 ; i < 2 ; i++) {
+            for (int j = 0 ; j < 2 ; j++) {
+                if (isPossibleToMakeSquare(grid, i, j)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    private static boolean isPossibleToMakeSquare(char[][] grid, int i, int j) {
+        int numberOfBlacks = 0;
+        int numberOfWhites = 0;
+
+        for (int row = i ; row < i + 2 ; row++) {
+            for (int column = j ; column < j + 2 ; column++) {
+                if (grid[row][column] == 'W') {
+                    numberOfWhites++;
+                } else {
+                    numberOfBlacks++;
+                }
+            }
+        }
+
+        return numberOfBlacks == 4 || numberOfWhites == 4 || numberOfBlacks == 3 || numberOfWhites == 3;
+    }
+}