Java tutorial
//package com.java2s; //License from project: Apache License import java.util.Calendar; import java.util.Date; public class Main { public static int getWeekOfDateDecimal(Date dt) { int[] weekDays = { 6, 0, 1, 2, 3, 4, 5 }; Calendar cal = Calendar.getInstance(); cal.setTime(dt); int w = cal.get(Calendar.DAY_OF_WEEK) - 1; if (w < 0) w = 0; return weekDays[w]; } }