Update Implementation AIGridGUI class

src/main/java/BattleShip/AIGridGUI.java

@@ -349,6 +349,16 @@ public class AIGridGUI extends JPanel {
                 if(!unkilledCells) {
                     randomGuess = true;
                 }
+            } else {
+                //If cell hit but not killed, mark cell appropriately.
+                text = "Other player got a hit. Your turn.";
+                b.setBackground(Color.red);
+                //If previously random guessing, switch to locking onto the hit cell.
+                if(randomGuess) {
+                    f = b.getGridLocation();
+                    randomGuess = false;
+                }
+                cellsHit[guessLocation] = true;
             }
         }
     }