Here you can find the source of getWeekDay(Date date)
public static final int getWeekDay(Date date)
//package com.java2s; /**/*from w ww. jav a 2 s. c o m*/ * DateTimeUtil.java * * Copyright 2010 Baidu.com, Inc. * * Baidu.com licenses this file to you under the Apache License, version 2.0 * (the "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Main { public static final int getWeekDay(Date date) { GregorianCalendar cal = new GregorianCalendar(); cal.setTime(date); return cal.get(Calendar.DAY_OF_WEEK); } }