node

src/Actions.java

@@ -6,6 +6,6 @@ public enum Actions {
 	WOLF_LEFT_TO_BOAT, WOLF_RIGHT_TO_BOAT, 
 	WOLF_BOAT_TO_LEFT, WOLF_BOAT_TO_RIGHT,
 	CHICKEN_RIGHT_TO_BOAT, CHICKEN_LEFT_TO_BOAT,
-	CHICKEN_BOAT_TO_RIGHT, CHICKEN_BOAT_TO_LEFT,
+	CHICKEN_BOAT_TO_RIGHT, CHICKEN_BOAT_TO_LEFT, VOID
 	
 }

src/Main.java

@@ -2,7 +2,7 @@ import java.util.ArrayList;
 
 public class Main {
 
-    private boolean planCompleted = false;
+    private static boolean planCompleted = false;
 
     public static void main(String[] args) {
 
@@ -17,19 +17,40 @@ public class Main {
         // Instantiating a new  Game State object
         GameState gs = new GameState(lBank, rBank, raft, true);
 
-        // Invoking get actions method and storing the results in an array list
-        ArrayList<Actions> validActions = getActions(gs);
+        // Closed list
+        ArrayList<GameState> closedList = new ArrayList();
 
         // Array list to hold game states
-        ArrayList<GameState> newStates = new ArrayList();
+        ArrayList<Node> frontier = new ArrayList();
+        frontier.add(new Node(Actions.VOID, gs));
+
+        while (true) {
+
+            Node firstNode = frontier.get(0);
+
+            if (goalTest(firstNode.gs)) {
+
+                System.out.print("COMPLETE");
+                planCompleted = true;
+
+            }
+
+            ArrayList<Actions> validActions = getActions(firstNode.gs);
 
             // Iterate through valid actions simulating their game state
             for (Actions a : validActions) {
 
-            gs = Simulate(gs, a);
+                gs = Simulate(firstNode.gs, a);
+
+                if (!closedList.contains(gs)) {
 
-            // Storing possible game states in array list
-            newStates.add(gs);
+                    // Storing possible game states in frontier
+                    frontier.add(new Node(a, gs));
+
+                }
+            }
+
+            closedList.add(firstNode.gs);
 
         }
 
@@ -39,7 +60,7 @@ public class Main {
     private static ArrayList<Actions> getActions(GameState gs) {
 
         // Array list to hold possible actions
-        ArrayList<Actions> possibleActions = new ArrayList<>();
+        ArrayList<Actions> possibleActions = new ArrayList();
 
         // Counters to hold game information
         int wolvesOnLBank = 0;
@@ -53,7 +74,9 @@ public class Main {
 
         // Getting current state of game
         if (gs.raft.size() > 1) {
+
             raftFull = true;
+
         }
 
         for (int i : gs.leftBank) {
@@ -238,10 +261,11 @@ public class Main {
         }
 
         return gs;
+
     }
 
     // Goal test method
-    public boolean goalTest(GameState gs) {
+    public static boolean goalTest(GameState gs) {
 
         int lengthR = gs.rightBank.size();
         int lengthL = gs.leftBank.size();
@@ -293,7 +317,7 @@ public class Main {
     }
 
     // Check final counts
-    private boolean completed(int wolves, int chickens) {
+    private static boolean completed(int wolves, int chickens) {
 
         if ((wolves == 3) && (chickens == 3)) {
 
@@ -303,7 +327,9 @@ public class Main {
         } else {
 
             return false;
+
         }
+
     }
 
 }

src/Node.java

+public class Node {
+
+    Node parent;
+    GameState gs;
+
+    public Node(Actions actionTaken, GameState gs) {
+        this.gs = gs;
+
+
+    }
+
+    public void setParent(Node parent) {
+
+        this.parent = parent;
+    }
+
+}