finish extract

src/main/java/app/SimulatorApplication.java

@@ -26,7 +26,7 @@ public class SimulatorApplication extends javafx.application.Application {
     this.primaryStage = primaryStage;
     this.primaryStage.setTitle(APP_NAME);
     this.primaryStage.setOnCloseRequest(event -> Platform.exit());
-    this.primaryStage.setResizable(false);
+    this.primaryStage.setResizable(true);
     this.primaryStage.sizeToScene();
   }
 

src/main/java/model/FirefighterBoard.java

@@ -10,15 +10,30 @@ public class FirefighterBoard implements Board<List<ModelElement>> {
   private final int rowCount;
   private final int initialFireCount;
   private final int initialFirefighterCount;
-  private final TargetStrategy targetStrategy = new TargetStrategy(this);
+  private final TargetStrategy targetStrategy = new TargetStrategy();
   private List<Position> firefighterPositions;
   private Set<Position> firePositions;
+  private Map<Position, List<Position>> neighbors = new HashMap();
+  private final Position[][] positions;
   private int step = 0;
   private final Random randomGenerator = new Random();
 
   public FirefighterBoard(int columnCount, int rowCount, int initialFireCount, int initialFirefighterCount) {
     this.columnCount = columnCount;
     this.rowCount = rowCount;
+    this.positions = new Position[rowCount][columnCount];
+    for (int column = 0; column < columnCount; column++)
+      for (int row = 0; row < rowCount; row++)
+        positions[row][column] = new Position(row, column);
+    for (int column = 0; column < columnCount; column++)
+      for (int row = 0; row < rowCount; row++) {
+        List<Position> list = new ArrayList<>();
+        if (row > 0) list.add(positions[row - 1][column]);
+        if (column > 0) list.add(positions[row][column - 1]);
+        if (row < rowCount - 1) list.add(positions[row + 1][column]);
+        if (column < columnCount - 1) list.add(positions[row][column + 1]);
+        neighbors.put(positions[row][column], list);
+      }
     this.initialFireCount = initialFireCount;
     this.initialFirefighterCount = initialFirefighterCount;
     initializeElements();
@@ -70,7 +85,7 @@ public class FirefighterBoard implements Board<List<ModelElement>> {
     if (step % 2 == 0) {
       List<Position> newFirePositions = new ArrayList<>();
       for (Position fire : firePositions) {
-        newFirePositions.addAll(neighbors(fire));
+        newFirePositions.addAll(neighbors.get(fire));
       }
       firePositions.addAll(newFirePositions);
       modifiedPositions.addAll(newFirePositions);
@@ -89,12 +104,13 @@ public class FirefighterBoard implements Board<List<ModelElement>> {
     List<Position> firefighterNewPositions = new ArrayList<>();
     for (Position firefighterPosition : firefighterPositions) {
       Position newFirefighterPosition =
-              targetStrategy.neighborClosestToFire(firefighterPosition, firePositions);
+              targetStrategy.neighborClosestToFire(firefighterPosition,
+                      firePositions, neighbors);
       firefighterNewPositions.add(newFirefighterPosition);
       extinguish(newFirefighterPosition);
       modifiedPosition.add(firefighterPosition);
       modifiedPosition.add(newFirefighterPosition);
-      List<Position> neighborFirePositions = neighbors(newFirefighterPosition).stream()
+      List<Position> neighborFirePositions = neighbors.get(newFirefighterPosition).stream()
               .filter(firePositions::contains).toList();
       for (Position firePosition : neighborFirePositions)
         extinguish(firePosition);
@@ -114,14 +130,6 @@ public class FirefighterBoard implements Board<List<ModelElement>> {
     firePositions.remove(position);
   }
 
-  public List<Position> neighbors(Position position) {
-    List<Position> list = new ArrayList<>();
-    if (position.row() > 0) list.add(new Position(position.row() - 1, position.column()));
-    if (position.column() > 0) list.add(new Position(position.row(), position.column() - 1));
-    if (position.row() < rowCount - 1) list.add(new Position(position.row() + 1, position.column()));
-    if (position.column() < columnCount - 1) list.add(new Position(position.row(), position.column() + 1));
-    return list;
-  }
 
   @Override
   public void setState(List<ModelElement> state, Position position) {
@@ -136,7 +144,4 @@ public class FirefighterBoard implements Board<List<ModelElement>> {
       }
     }
   }
-
-  public List<Position> getFirePositions() {
-return firefighterPositions;  }
 }
\ No newline at end of file

src/main/java/model/TargetStrategy.java → src/main/java/util/TargetStrategy.java

@@ -5,28 +5,25 @@ import util.Position;
 import java.util.*;
 
 public class TargetStrategy {
-    private final FirefighterBoard firefighterBoard;
 
-    public TargetStrategy(FirefighterBoard firefighterBoard) {
-        this.firefighterBoard = firefighterBoard;
-    }
 
     /**
      * @param position current position.
      * @param targets positions that are targeted.
      * @return the position next to the current position that is on the path to the closest target.
      */
-    Position neighborClosestToFire(Position position, Collection<Position> targets) {
+    Position neighborClosestToFire(Position position, Collection<Position> targets,
+                                   Map<Position,List<Position>>neighbors) {
         Set<Position> seen = new HashSet<Position>();
         HashMap<Position, Position> firstMove = new HashMap<Position, Position>();
-        Queue<Position> toVisit = new LinkedList<Position>(firefighterBoard.neighbors(position));
+        Queue<Position> toVisit = new LinkedList<Position>(neighbors.get(position));
         for (Position initialMove : toVisit)
             firstMove.put(initialMove, initialMove);
         while (!toVisit.isEmpty()) {
             Position current = toVisit.poll();
             if (targets.contains(current))
                 return firstMove.get(current);
-            for (Position adjacent : firefighterBoard.neighbors(current)) {
+            for (Position adjacent : neighbors.get(current)) {
                 if (seen.contains(adjacent)) continue;
                 toVisit.add(adjacent);
                 seen.add(adjacent);