Java Coding Problems

64. Getting date and time units

For a Date object, the solution may rely on a Calendar instance. The code that is bundled to this book contains this solution.

For JDK 8 classes, Java provides dedicated getFoo() methods and a get​(TemporalField field) method. For example, let's assume the following LocalDateTime object:

LocalDateTime ldt = LocalDateTime.now();

Relying on getFoo() methods, we get the following code:

int year = ldt.getYear();int month = ldt.getMonthValue();int day = ldt.getDayOfMonth();int hour = ldt.getHour();int minute = ldt.getMinute();int second = ldt.getSecond();int nano = ldt.getNano();

Or, relying on get​(TemporalField field) results in the following:

int yearLDT = ldt.get(ChronoField.YEAR);int monthLDT = ldt.get(ChronoField.MONTH_OF_YEAR); ...