import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

public class ArrayLists {

public static void main(String[] args) {

ArrayList<Integer> numbers = new ArrayList<>();

ArrayList<Integer> randomNumbers = new ArrayList<>(Arrays.asList(1,2,3));

System.out.println(randomNumbers);

// object version, not primitive int version

// don't need to include anything in second angle brackets

// don't need to include a value in last parentheses

// Add elements to an ArrayList. The element type is the determined by the Object type within the angle brackets <>

numbers.add(10);

numbers.add(12);

numbers.add(13);

// .add doesn't return anything

// numbers.remove(Integer.valueOf(12));

// used to remove certain value

// prints out ArrayList

System.out.println(numbers);

// return length of the ArrayList with .size()

System.out.println(numbers.size());

// return an element at the specified index

System.out.println(numbers.get(1));

// returns index position of found element, -1 if not found.

System.out.println(numbers.indexOf(13));

System.out.println(numbers.indexOf(20));

// TODO: Add a new Integer to the numbers ArrayList at index 1.

numbers.add(1, 800);

System.out.println(numbers.get(1));

ArrayList<String> roasts = new ArrayList<>();

roasts.add("light");

roasts.add("medium");

roasts.add("medium");

roasts.add("medium");

roasts.add("dark");

roasts.add("dark");

roasts.add("medium");

System.out.println(roasts);

// .contains returns a boolean value based on whether or not a searched value exists in the ArrayList

System.out.println(roasts.contains("dark"));

// TODO: Check if the roasts list contains "espresso"

System.out.println(roasts.contains("espresso"));

// returns the last occurrence of a given value

// TODO: Find the last "medium" roast in the list.

System.out.println("Last medium roast:");

System.out.println(roasts.lastIndexOf("medium"));

// TODO: How could we check if the roasts list is empty?

System.out.println(roasts.isEmpty());

// if empty, will return true

// if not empty, will return false

// TODO: Remove one medium roast from the list. If there are duplicate strings in the list, which one is removed first?

System.out.println(roasts.remove("medium"));

// System.out.println(roasts);

// if duplicate strings, the first is removed

// return is boolean true or false

// TODO: Remove the element at index 4. Note the return value here vs. the previous remove method.

System.out.println(roasts.remove(4));

// return type is the actual item removed

System.out.println(roasts);

// BONUS TODO: How can we get the list of roasts in alphabetical order?

Collections.sort(roasts);

System.out.println(roasts);

// or

roasts.sort(String::compareTo);

}

}