Android examples for java.util:Month
Get last month day of week
/*/*from ww w. j a va2 s . co m*/ * Copyright (C) 2016 venshine.cn@gmail.com * * Licensed 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. */ //package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { /** * Get last month day of week * * @return */ public static int getLastMonthDayOfWeek() { return getMonthDayOfWeek(getCurrentYear(), getCurrentMonth() - 1); } /** * Get month day of week by year, month * * @param year * @param month * @return */ public static int getMonthDayOfWeek(int year, int month) { Calendar cal = Calendar.getInstance(); String dateString = year + "-" + (month > 9 ? month : ("0" + month)) + "-01"; String pattern = "yyyy-MM-dd"; Date date = null; try { SimpleDateFormat sdf = new SimpleDateFormat(pattern); date = sdf.parse(dateString); } catch (ParseException e) { } if (date != null) { cal.setTime(date); int week_index = cal.get(Calendar.DAY_OF_WEEK) - 1; if (week_index < 0) { week_index = 0; } return week_index; } return -1; } /** * Get current year * * @return */ public static int getCurrentYear() { return Calendar.getInstance().get(Calendar.YEAR); } /** * Get current month * * @return */ public static int getCurrentMonth() { return Calendar.getInstance().get(Calendar.MONTH) + 1; } }