CODEWITHSUNDEEP
javalisttuples
Flippy
Flippy

Reputation: 221

Add Input to TupleList

I created a new class with for a new List with 2 entries:

public class NodeList<T, I> {
        public final T type;
        public final I id;

        public NodeList (T type, I id){
            this.type = type;
            this.id = id;
        }

        public T getT() { return type; }
        public I getI() { return id; }
}

Now I want to create this List inside another class (Controller of my javafx BorderPane)

List<NodeList> nodeList = new ArrayList<NodeList>();

And I want to add two Strings in this List.

public void addNodeList(){
    String a = "a";
    String b = "b";
    nodeList.add(a, b);
}

What am I doing wrong?

Upvotes: 0

Views: 43

Answers (2)

marstran
marstran

Reputation: 28056

You need to create a new object of type NodeList. A List does not have an add method that takes two strings directly. To fix it, do this:

public void addNodeList(){
    String a = "a";
    String b = "b";
    nodeList.add(new NodeList<String, String>(a, b));
}

Upvotes: 1

Mureinik
Mureinik

Reputation: 312086

There are no "implicit constructors" in Java. You have to explicitly instantiate a new NodeList to hold the two Strings:

public void addNodeList(){
    String a = "a";
    String b = "b";
    nodeList.add(new NodeList<>(a, b));
    // Here -----^
}

Upvotes: 2

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