TestCountry.java

import java.util.ArrayList;
import java.util.Objects;
import java.util.Scanner;

public class TestCountry {

    public static void main(String[] args) {

        ArrayList <Country> lineArrayList = new ArrayList <>();
        Scanner scan = new Scanner(System.in);

        String controlString;
        do {
            System.out.println("Enter a control String: ");
            controlString = scan.nextLine();

            if (controlString.equals("party")) {
                System.exit(0);
            } else if (controlString.equals("lake")) {
                lineArrayList.stream().filter(Objects::nonNull).forEach(System.out::println);
            } else if (controlString.equals("raspy")) {
                System.out.println("Enter country name: ");
                String countryName = scan.nextLine();

                System.out.println("Enter an int number: ");
                int intNumber = Integer.parseInt(scan.nextLine());

                System.out.println("Enter a double number: ");
                double doubleNumber = Double.parseDouble(scan.nextLine());

                // Create a Country object snd store it in the ArrayList
                lineArrayList.add(new Country(countryName, intNumber, doubleNumber));

            } else if (controlString.equals("sky")) {

                System.out.println("Enter another control String: ");
                String searchString = scan.nextLine();

                lineArrayList.stream()
                        .filter(country -> country != null && country.getAnger().endsWith(searchString))
                        .forEach(System.out::println);
            } else {
                System.out.println("Goodbye.");
            }
        } while (controlString.equals("lake")
                || controlString.equals("raspy")
                || controlString.equals("sky"));
    }
}