// Hack 1
import java.util.ArrayList;

public class Example {
  public static void main(String[] args) {
    
    // a) ArrayList that stores Boolean values
    ArrayList<Boolean> booleanList = new ArrayList<>();

    // b) ArrayList that stores Turtle Objects
    ArrayList<String> dogsList = new ArrayList<>();

    // c) ArrayList that initializes with 10 Strings
    ArrayList<String> stringList = new ArrayList<>(10);
    stringList.add("one");
    stringList.add("two");
    stringList.add("three");
    stringList.add("four");
    stringList.add("five");
    stringList.add("six");
    stringList.add("seven");
    stringList.add("eight");
    stringList.add("nine");
    stringList.add("ten");
    booleanList.add(true);

    // Print the contents of each ArrayList
    System.out.println("Boolean List:");
    for (Boolean b : booleanList) {
      System.out.println(b);
    }
    System.out.println("Dogs List:");
    for (String b : stringList) {
      System.out.println(b);
    }
    System.out.println("String List:");
    for (String s : stringList) {
      System.out.println(s);
    }
  }
}
Example.main(null);

Boolean List:
true
Dogs List:
one
two
three
four
five
six
seven
eight
nine
ten
String List:
one
two
three
four
five
six
seven
eight
nine
ten

// Hack 2
import java.util.ArrayList;

public class Hack2 {
    public static void main(Integer[] args) {
        ArrayList<Integer> randomNumbers = new ArrayList<Integer>();
        randomNumbers.add(1);
        randomNumbers.add(4);
        randomNumbers.add(7);
        randomNumbers.add(12);
        randomNumbers.add(23);
        System.out.println("ArrayList: " + randomNumbers);
        randomNumbers.remove(3); // Removes the element at index 3 (which is 12)
        System.out.println("ArrayList: " + randomNumbers);
        randomNumbers.set(2, 9); // Replaces the element at index 2 (which is 7) with 9
        System.out.println("ArrayList: " + randomNumbers);
        randomNumbers.add(6);
        System.out.println("ArrayList: " + randomNumbers);




        ;
        ;
        ;
    }
}
Hack2.main(null);

ArrayList: [1, 4, 7, 12, 23]
ArrayList: [1, 4, 7, 23]
ArrayList: [1, 4, 9, 23]
ArrayList: [1, 4, 9, 23, 6]