Here you can find the source of getWeekCategory(final Date date)
private static String getWeekCategory(final Date date)
//package com.java2s; /**/*from ww w . j a va 2 s . c o m*/ * OpenTrainingCenter * * Copyright (C) 2014 Sascha Iseli sascha.iseli(at)gmx.ch * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.Calendar; import java.util.Date; import java.util.Locale; public class Main { private static String getWeekCategory(final Date date) { String week = String.valueOf(createDate(date).get(Calendar.WEEK_OF_YEAR)); if (week.length() == 1) { week = "0" + week; //$NON-NLS-1$ } return week; } private static Calendar createDate(final Date date) { final Calendar cal = Calendar.getInstance(Locale.getDefault()); cal.setTime(date); return cal; } }