Accessing variable in Main method from other class

Question

I have two classes:

public class node {
  static LinkedList<Integer> nodes = new LinkedList<Integer>();
  public boolean visited;

  public static void Main (String args []) {
    System.out.println("Number of nodes in network");
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    for (int i=1;i<=n;i++){
      nodes.add(i);
    }

    System.out.println(nodes);
  }

and another class

public class AdjacencyList {
  private int n;
  private int density;

I want to access int n from Mainmethod and assign its value to private int n in AdjacencyList class. I tried node.n (class.variable) format in a method where I can assign values but its not working out. Can anybody please help me with this?

Answer 1

Simply,

public class AdjacencyList {
    private int n;
    private int density;

    //method to get value of n
    public int getN() { return this.n; }

    //method to set n to new value
    public void setN(final int n) { this.n = n; }

Then, in your main(), you can do this:

AdjacencyList myList = new AdjacencyList();

//set n to any value, here 10
myList.setN(10);

//get n's current value
int currentN = myList.getN();

All this is basic java stuff, please go through the docs again, especially here and here.