package JavaOOP.HomeWork1;

import java.util.ArrayList;
import java.util.Arrays;

public class NamesWithStartLetterFinder {

    public static void main(String[] args) {

        ArrayList<String> names = new ArrayList<>(Arrays.asList("Phil", "Anny", "Aaron", "Bob"));

        System.out.println("Names beginning with the letter 'A' in the list " +
                names + ": " + namesWithStartLetter(names, 'A'));
        System.out.println("Names beginning with the letter 'A' in the list " +
                new ArrayList<>() + ": " +namesWithStartLetter(new ArrayList<>(), 'A'));
    }

    public static ArrayList<String> namesWithStartLetter(ArrayList<String> names, char startLetter) {
        ArrayList<String> namesFromTheGivenLetter = new ArrayList<>();

        for (String name : names) {
            if (startLetter == name.charAt(0)) {
                namesFromTheGivenLetter.add(name);
            }
        }
        return  namesFromTheGivenLetter;
    }
}

//Output
//namesWithStartLetter(names, 'A') ---> ["Anny", "Aaron"];
//namesWithStartLetter(new ArrayList<>(), 'A') ---> [ ];