Java Calendar always shows the same time

Question

Below is my code.

public class TestCalendar {

public static void main(String[] args){
    int unique_id = Integer.parseInt(\"\" + Calendar.HOUR + Calendar.M         


        

Answer 1

Calendar.HOUR (or MINUTE, SECOND) is just an indicator that indicates which field we want to extract from the Calendar instance, not the value, i.e. we want to 'extract HOUR from the calendar object' like below:

Calendar c = Calendar.getInstance();

int hour = c.get(Calendar.HOUR_OF_DAY); // in 24-hours,
                                        // or c.get(Calendar.HOUR) in 12-hours.
int minute = c.get(Calendar.MINUTE);
int second = c.get(Calendar.SECOND);

int weekday = c.get(Calendar.DAY_OF_WEEK);
int weekOfYear = c.get(Calendar.WEEK_OF_YEAR);