PriorityQueue Class - Why is this happening

[Jim Hester]

So I'm trying to set up a PriorityQueue that sorts two nodes (part of an implementation of the A* algorithm), and I THINK I'm using the constructor right, but it's giving me an error (type <package>.PriorityQueue does not take parameters. Any thoughts as to what I'm doing wrong? Putting entire class code as I have it currently in there, but really just interested in feedback on how to get my PriorityQueue working. thanks!

    import java.util.*;

public class a_star{
    int[] goalArray;
    PriorityQueue<PuzzleNode> openList = new PriorityQueue<PuzzleNode>
            (1, 
            new Comparator<PuzzleNode>(){
                public int compare(PuzzleNode a, PuzzleNode b){
                    if (a.getPathCost() > b.getPathCost())
                        return 1;
                    else if (a.getPathCost() < b.getPathCost())
                        return -1;
                    else 
                        return 0;
                }
    }
            );
    LinkedList<PuzzleNode> closedList;
    
    public a_star(int[] goal, PuzzleNode starter){
        this.goalArray = goal;
        this.openList.add(starter);
    }

    public a_star(){
        
    }

    public void findPath(){
        while (openList.isEmpty() == false){
            
        }
    }
    
} 

[Ernest Friedman-Hill]

Sounds like you may have your own class named "PriorityQueue" somewhere. What is "<package>" in your code above? If it's anything other than "java.util", then it should point you to where this other class is. It might be in a library somewhere, or something you created. If it's the latter, then your operating system's "find file" capability might help you find PriorityQueue.class and/or PriorityQueue.java, wherever they live.

[Jim Hester]

Ernest Friedman-Hill wrote:Sounds like you may have your own class named "PriorityQueue" somewhere. What is "<package>" in your code above? If it's anything other than "java.util", then it should point you to where this other class is. It might be in a library somewhere, or something you created. If it's the latter, then your operating system's "find file" capability might help you find PriorityQueue.class and/or PriorityQueue.java, wherever they live.

that was it! I had a class file for "PriorityQueue" I had started and forgot about. thanks so much.