An implementation to find the last days in each month for a specific year.

Java 8 Lambdas and Date Time

public List<DayOfWeek> lastDaysOfMonthsInYear(int year) {
    return Stream.of(Month.values())
            .map(month -> LocalDate.now().withYear(year)
                    .with(month)
                    .with(TemporalAdjusters.lastDayOfMonth())
                    .getDayOfWeek())
            .collect(Collectors.toList());
}

Improved based on this implementation: https://gist.github.com/RichardWarburton/8446478