package ultima;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.Stack;
import java.util.Vector;

public class NestedCollection {

  List<List<String>> nestedList = Arrays.asList(Arrays.asList("one:one"),
      Arrays.asList("two:one", "two:two", "two:three"),
      Arrays.asList("three:one", "three:two", "three:three", "three:four"));

  // ArrayList<Class> myList = new ArrayList<Class>();
  // TODO make it static
  List<String> listL = new ArrayList<String>(List.of("A", "C", "B"));
  List<String> listLL = new LinkedList<>();
  List<String> listLV = new Vector<>();
  List<String> listLS = new Stack<>();

  /**
   * Test List.
   *
   * @return String return first element of sorted list.
   */
  public String getTest() {
    String a[] = new String[] { "E", "B", "A", "C", "D" };
    // getting the list view of Array
    List<String> list = Arrays.asList(a);
    System.out.println("The List<String> is: " + list);
    list.sort(null);
    return list.get(1);
  }

  /**
   * Main.
   *
   * @param args
   *               null
   */
  public static void main(String[] args) {
    // simple example of List<String> and add
    try {
      // creating Arrays of String type
      String a[] = new String[] { "E", "B", "A", "C", "D" };

      // getting the list view of Array
      List<String> list = Arrays.asList(a);
      System.out.println("The List<String> is: " + list);
      list.sort(null);

      System.out.println("The sort and add List<String> is: " + list);

      // printing the list
      System.out.println("The List<String> is: " + list);
      // FIXME make static - Cannot make a static reference to the non-static field
      list.add("A");

      List<String> listL2 = new ArrayList<String>(List.of(a));
      listL2.add("A");

    } catch (NullPointerException e) {
      System.out.println("Exception thrown : " + e);
    }
    // simple example of List<List<String>>
    try {
      System.out.println("The List<List<String>> is: " + new NestedCollection().nestedList);
    } catch (NullPointerException e) {
      System.out.println("Exception thrown : " + e);
    }
  }
}