ArrayList) Practice

import java.util.ArrayList;

public class Main {

    public static void main(String[] args) {

        //initialising the ArrayList object called weeklyTemperatures
        ArrayList<Integer> weeklyTemperatures = new ArrayList<Integer>();

        //using the .add method to add elements to the ArrayList
        weeklyTemperatures.add(67);
        weeklyTemperatures.add(89);
        weeklyTemperatures.add(94);

        //Printing the elements of the ArrayList
        System.out.println("this is slot 1: " + weeklyTemperatures.get(0));
        System.out.println("this is slot 2: " + weeklyTemperatures.get(1));
        System.out.println("this is slot 3: " + weeklyTemperatures.get(2));

        //Adding a new element to the ArrayList
        weeklyTemperatures.add(56);
        System.out.println("this is slot 4: " + weeklyTemperatures.get(3));

        //Adding an element to a specific slot location in the ArrayList, this moves the elements after this slot all up one space
        weeklyTemperatures.add(0,68);
        System.out.println("this is slot 1: " + weeklyTemperatures.get(0));

        //Printing using a for loop
        System.out.println("Using the for loop");
        for (int i = 0; i < weeklyTemperatures.size();i++){
            System.out.println("This is slot " + (i+1) + ": " + weeklyTemperatures.get(i));
        }

        //adding a new element in the 3rd slot
        weeklyTemperatures.add(2,66);

        System.out.println("Using the for loop");
        for (int i = 0; i < weeklyTemperatures.size();i++){
            System.out.println("This is slot " + (i+1) + ": " + weeklyTemperatures.get(i));
        }



        //ArrayLists can be of any variable type, integer, double, strings etc
        ArrayList<String> weeklyDays = new ArrayList<String>();
        weeklyDays.add("Monday");
        weeklyDays.add("Tuesday");
        weeklyDays.add("Sunday");

        System.out.println(weeklyDays.get(0));
        System.out.println(weeklyDays.get(1));
        System.out.println(weeklyDays.get(2));

    }
}