Thread: Retrieving BFS code's adjacency list

I am trying to create a bfs program but I am getting stuck with the Node class ArrayList retrieval part. I am trying to create 28 nodes, each with their own adjacency list. I want to retrieve the adjacency list from any given node so i can perform operations based on the node mapped to the string in the adjacency list. When I try to retrieve the adjacency list, it comes back empty when there should be, for example in node 1, a list with the string 2, 4, 5. this way i can get the node mapped to the string key "2", etc.The code is:

class Node{
String name;
ArrayList<String> list;
 
 
public Node(){}
 
public Node( String name, ArrayList<String> list){
this.name = name;
this.list = list;
 
for( String n : list ){
System.out.println("DEBUG: test if list got passed in " + n );
}//it does print the list elements
 
 
}
}
 
 
public static void BFS(){
 
//Queue<Node> q = new LinkedList<Node> ();
Vector<Node> q = new Vector<Node> ();
 
 
Map<String, Node> allNodes = new HashMap<String, Node> (28);
 
 
ArrayList<String> l = new ArrayList<String>();
l.add("2");
l.add("4");
l.add("5");
Node One = new Node("1", l);
allNodes.put("1", One );
 
// clear l so it can contain new elements to be sent to Node constructor
l.clear();
 
l.add("3");
l.add("6");
Node Two = new Node("2", l);
allNodes.put("2", Two);
 
l.clear()
 
Node j = allNodes.get("1");
System.out.println("J = 1---- J's name = " +j.name);
System.out.println("J's list = " +j.list);
....}

The output i get is:

DEBUG: test if list got passed in 2
DEBUG: test if list got passed in 4
DEBUG: test if list got passed in 5
J = 1---- J's name = 1
J's list = []

the list is empty. I want it to retrieve the nodes adjacency list. How do I fix this?

Thanks in advance

I also attached the full code file for people but its not needed for my question i believe.