Update Implementation AIGridGUI class

src/main/java/BattleShip/AIGridGUI.java

@@ -26,7 +26,10 @@ public class AIGridGUI extends JPanel {
     int f; // it is the first
     Color Red = new Color(100, 0, 0); //
     Border loweredBevel = BorderFactory.createLoweredBevelBorder();
+    Border  raisedbevel = BorderFactory.createRaisedBevelBorder();
     Border defaultBorder;
+    //empty = BorderFactory.createEmptyBorder(4, 4, 4, 4);
+    Border compound = BorderFactory.createCompoundBorder();
     Ship shipToPlace;
     boolean vertical = false;
     boolean clear;
@@ -499,7 +502,7 @@ public class AIGridGUI extends JPanel {
 
     public void highlightCells(BSButton b, int x) {
         BSButton cell = b;
-        int actionToTake = x;
+        int action = x;
         clear = true;
 
         //Check whether sufficient spaces are clear to place the ship.
@@ -511,5 +514,29 @@ public class AIGridGUI extends JPanel {
                 }
             }
         }
+
+        if(clear) {
+            if(vertical) {
+
+                for(int i = 0; i < shipToPlace.getLength(); i++) {
+                    BSButton bsb = buttons.get(cell.getGridLocation() + (i * columns));
+                    //If mouse entered, highlight cells via lowered bevel.
+                    if(action == 1) {
+                        bsb.setBorder(raisedbevel);
+                    } else {
+                        //If mouse released, place ship and color ship cells.
+                        if(action == 2) {
+                            bsb.setCellContents(shipToPlace);
+                            bsb.setBackground(Color.gray);
+                            bsb.setBorder(raisedbevel);
+                        } else {
+                            //If mouse exited, unhighlight cells.
+                            bsb.setBorder(compound);
+                        }
+                    }
+                }
+            }
+        }
     }
+
 }