implémentation de la méthode goToNextState

Grid.java

@@ -135,6 +135,14 @@ public class Grid implements Iterable<Cell> {
     }
 
     private void goToNextState(boolean[][] nextState) {
+        for (int i = 0; i < getNumberOfRows(); i++) {
+            for (int j = 0; j < getNumberOfColumns(); j++) {
+                if (nextState[i][j])
+                    getCell(i, j).setAlive();
+                else
+                    getCell(i, j).setDead();
+            }
+        }
     }
 
     /**