Determine if an hour is between an intervalTag(s): Date and Time
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import java.util.Calendar;
import java.text.SimpleDateFormat;
public class DateUtils {
// format 24hre ex. 12:12 , 17:15
private static String HOUR_FORMAT = "HH:mm";
private DateUtils() { }
public static String getCurrentHour() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdfHour = new SimpleDateFormat(HOUR_FORMAT);
String hour = sdfHour.format(cal.getTime());
return hour;
}
/**
* @param target hour to check
* @param start interval start
* @param end interval end
* @return true true if the given hour is between
*/
public static boolean isHourInInterval(String target, String start, String end) {
return ((target.compareTo(start) >= 0)
&& (target.compareTo(end) <= 0));
}
/**
* @param start interval start
* @param end interval end
* @return true true if the current hour is between
*/
public static boolean isNowInInterval(String start, String end) {
return DateUtils.isHourInInterval
(DateUtils.getCurrentHour(), start, end);
}
// TEST
public static void main (String[] args) {
String now = DateUtils.getCurrentHour();
String start = "14:00";
String end = "14:26";
System. out.println(now + " between " + start + "-" + end + "?");
System. out.println(DateUtils.isHourInInterval(now,start,end));
/*
* output example :
* 21:01 between 14:00-14:26?
* false
*
*/
}
}