Problem1.java

public class Main {
    public static void main(String[] args) throws InterruptedException {
        System.out.println("Works");
    }
}

public static Map<String, User> findLowIncomeCitizens(ArrayList users) {
return users.stream()
.filter(user -> user.getCity().equals("New York") && user.getSalary() < 100L)
.collect(Collectors.toMap(User::getGuid, Function.identity()));
}

public static Country findCountryByName(DataSource dataSource, String countryName) throws SQLException {
try (Connection connection = dataSource.getConnection();
PreparedStatement statement = connection.prepareStatement("SELECT * FROM countries WHERE name = ?")) {
statement.setString(1, countryName);
try (ResultSet resultSet = statement.executeQuery()) {
if (resultSet.next()) {
return new Country(countryName, resultSet.getString("region"));
}
}
} catch (SQLException e) {
return null;
}
return null;
}