Here you can find the source of isWorkTime(Calendar calendar, String workTimeStart, String workTimeEnd)
public static boolean isWorkTime(Calendar calendar, String workTimeStart, String workTimeEnd)
//package com.java2s; import java.util.Calendar; public class Main { public static boolean isWorkTime(Calendar calendar, String workTimeStart, String workTimeEnd) { int dayofweek = calendar.get(Calendar.DAY_OF_WEEK); int hourofday = calendar.get(Calendar.HOUR_OF_DAY); int workStart = Integer.parseInt(workTimeStart); int workEnd = Integer.parseInt(workTimeEnd); return dayofweek > Calendar.SUNDAY && dayofweek < Calendar.SATURDAY && hourofday >= workStart && hourofday <= workEnd; }// w w w . j a v a2 s . c om }