// To Calculate Review Time by skipping Non-Business Hours and Holidays
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.text.SimpleDateFormat;
public class SkipNonBusinessHours
{
public static final int BUSINESS_START_HOUR = 9; // 9 AM
public static final int BUSINESS_END_HOUR = 18; // 6 PM
public static void main(String[] args)
{
// One Working Day means 9 Hrs
final int WORKING_MINS_PER_DAY = 540; // Total Working Minutes per day
final int MINUTES_PER_HOUR = 60;
SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy hh:mm a");
int addTime = 1;
String sDaysOrHours = "hours"; // "days";
if(sDaysOrHours.equalsIgnoreCase("days"))
{
addTime = addTime * WORKING_MINS_PER_DAY; // Converting Days to Mins
}
else if(sDaysOrHours.equalsIgnoreCase("hours"))
{
addTime = addTime * MINUTES_PER_HOUR; // Converting Hours to Mins
}
// Getting Present Date and Time
Calendar n_givenDateTime = Calendar.getInstance();
System.out.println("Present Date:\t\t" + sdf.format(n_givenDateTime.getTime()));
SkipNonBusinessHours time = new SkipNonBusinessHours();
time.addBusinessTime(n_givenDateTime, addTime);
System.out.println("\nFinal Date :\t\t" + sdf.format(n_givenDateTime.getTime()));
}
// Method to add Review Time (in minutes) to Given Date
public void addBusinessTime(Calendar givenDateTime, int addTimeMins)
{
// To get Present Working Day & Hour excluding Holidays
adjustToBusinessHours(givenDateTime);
while(addTimeMins>0)
{
// Finding Business End Time On That Day
Calendar businessEndTime = Calendar.getInstance();
businessEndTime.setTime(givenDateTime.getTime());
businessEndTime.set(Calendar.HOUR_OF_DAY, BUSINESS_END_HOUR);
businessEndTime.clear(Calendar.MINUTE);
// Difference of Time in Minutes AND Conversion Milli-Seconds to Minutes
int diffMins = (int) (( businessEndTime.getTimeInMillis() -
givenDateTime.getTimeInMillis())/(1000*60));
if(addTimeMins < diffMins) // Adding Total Minutes to the Same Day
{
givenDateTime.add(Calendar.MINUTE, addTimeMins);
break;
}
else // Adding available Minutes to the Same Day
{
givenDateTime.add(Calendar.MINUTE, diffMins);
adjustToBusinessHours(givenDateTime);
addTimeMins = addTimeMins - diffMins;
}
}
}
// Method to skip Non-Business Hours (Before 9 AM and After 6 PM)
public void adjustToBusinessHours(Calendar givenDateTime)
{
int hourOfDay = givenDateTime.get(Calendar.HOUR_OF_DAY);
if(hourOfDay < BUSINESS_START_HOUR) // Skip to 9 AM on that Day
{
givenDateTime.set(Calendar.HOUR_OF_DAY, BUSINESS_START_HOUR);
givenDateTime.clear(Calendar.MINUTE);
}
if(hourOfDay >= BUSINESS_END_HOUR) // Skip to Next Day 9 AM
{
givenDateTime.add(Calendar.DATE, 1);
givenDateTime.set(Calendar.HOUR_OF_DAY, BUSINESS_START_HOUR);
givenDateTime.clear(Calendar.MINUTE);
}
skipHolidays(givenDateTime); // skip Holidays
}
// Method to skip Holidays ( Weekends and General )
public void skipHolidays(Calendar givenDateTime)
{
skipGeneralHolidays(givenDateTime); // General Holidays before Weekends
if(givenDateTime.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY)
{
givenDateTime.add(Calendar.DATE,2); // Saturday and Sunday
// in case of Business Hour
givenDateTime.set(Calendar.HOUR_OF_DAY, BUSINESS_START_HOUR);
givenDateTime.clear(Calendar.MINUTE);
}
if(givenDateTime.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY)
{
givenDateTime.add(Calendar.DATE,1); // Sunday
// in case of Business Hour
givenDateTime.set(Calendar.HOUR_OF_DAY, BUSINESS_START_HOUR);
givenDateTime.clear(Calendar.MINUTE);
}
skipGeneralHolidays(givenDateTime); // General Holidays after Weekends
}
// Method to skip General Holidays
public void skipGeneralHolidays(Calendar givenDateTime)
{
// Considering only given Date without Time (Temp)
Calendar givenDate = Calendar.getInstance();
givenDate.setTime(givenDateTime.getTime());
givenDate.set(Calendar.HOUR_OF_DAY, 0);
givenDate.set(Calendar.MINUTE, 0);
givenDate.set(Calendar.SECOND, 0);
givenDate.set(Calendar.MILLISECOND, 0);
// List of General Holidays
GregorianCalendar[] generalHolidays = getGeneralHolidays(givenDate);
for(int i=0; i<generalHolidays.length; i++) // Check for all Holidays
{
if(givenDate.equals(generalHolidays[i]))
{
givenDateTime.add(Calendar.DATE,1); // Add one date to Actual Date & Time
// in case of Business Hour
givenDateTime.set(Calendar.HOUR_OF_DAY, BUSINESS_START_HOUR);
givenDateTime.clear(Calendar.MINUTE);
givenDate.add(Calendar.DATE,1); // Add one date to Temp Date
}
}
}
// General Holidays list
public GregorianCalendar[] getGeneralHolidays(Calendar givenDate)
{
GregorianCalendar[] genHolidays = {
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.JANUARY, 14),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.JANUARY, 26),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.MAY, 1),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.AUGUST, 15),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.OCTOBER, 2),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.NOVEMBER, 1),
new GregorianCalendar(givenDate.get(Calendar.YEAR), Calendar.DECEMBER, 25)
};
return genHolidays;
}
}
Use Case: Process Automation in calculating latest Date for the application.
