Java Utility class to handle various task's related to Date and Time ex:Time concersion and various others

TimeUtils.java

/**
 * Created by Ashif on 22/03/17.
 */
 
public class TimeUtils {
    public static boolean isValidString(String string) {
        return string != null && !string.isEmpty();
    }

    public static String getStartDate() {
        Calendar calendar = Calendar.getInstance();
        int dayofWeek = calendar.get(Calendar.DAY_OF_WEEK);
        calendar.setFirstDayOfWeek(Calendar.MONDAY);
        if (dayofWeek != 7) {
            int previousWeek = calendar.get(Calendar.DAY_OF_WEEK) - calendar.getFirstDayOfWeek();
            calendar.add(Calendar.DATE, -previousWeek - 2);
        }
        calendar.setFirstDayOfWeek(Calendar.SATURDAY);

        String startDate= CommonUtils.getDateFormat().format(calendar.getTime());
        return startDate;
    }

    public static String getCurrentDate() {
        Date date = new Date();
        return getDateFormat().format(date.getTime());
    }

    public static SimpleDateFormat getDateFormat() {
        return new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
    }

    public static String getCurrentTime(boolean is24HrFormat) {
        Date date = new Date();
        return getTimeFormat(is24HrFormat).format(date.getTime());
    }

    public static SimpleDateFormat getTimeFormat(boolean is24HrFormat) {
        return new SimpleDateFormat(is24HrFormat ? "HH:mm" : "hh:mm a", Locale.getDefault());
    }

    public static String getCurrentDateTime() {
        Date date = new Date();
        return getDateTimeFormat().format(date.getTime());
    }

    public static SimpleDateFormat getDateTimeFormat() {
        return new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.getDefault());
    }

    public static SimpleDateFormat getUpdatedDateTimeFormat(){
        return  new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.getDefault());

    }


    public static Pair<String, String> getDateTimePair(String dateTime) {
        try {
            Date parsedDate = getDateTimeFormat().parse(dateTime);
            String date = getDateFormat().format(parsedDate);
            String time = getTimeFormat(true).format(parsedDate);
            return Pair.create(date, time);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return Pair.create(getCurrentDate(), getCurrentTime(true));
    }

    public static String getUserTime(String time) {
        try {
            Date parsedTime = getTimeFormat(true).parse(time);
            return getTimeFormat(false).format(parsedTime);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return getCurrentTime(false);
    }

    public static String getCurrentUserDate() {
        Date date = new Date();
        return getUserDateFormat().format(date.getTime());
    }

    public static String getUserDate(String date) {
        try {
            Date parsedDate = getDateFormat().parse(date);
            return getUserDateFormat().format(parsedDate);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return getCurrentUserDate();
    }

    public static SimpleDateFormat getUserDateFormat() {
        return new SimpleDateFormat("dd-MMM-yyyy", Locale.getDefault());
    }

    public static String convertToJSON(Object object) {
        ObjectMapper mapper = new ObjectMapper();
        try {
            return mapper.writeValueAsString(object);
        } catch (Exception e) {
            return null;
        }
    }
}