Here you can find the source of getlastDateofThisMonth()
public static final int getlastDateofThisMonth()
//package com.java2s; /**/*from w ww. j ava 2s . c o m*/ * Copyright 2011 Marco Berri - marcoberri@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. **/ import java.util.*; public class Main { /** * * @param month * @param year * @return */ public static final int getlastDateofThisMonth(int month, int year) { Calendar calendar = Calendar.getInstance(); if (year > -1) { calendar.set(Calendar.YEAR, year); } if (month > -1) { month--; calendar.set(Calendar.MONTH, month); } return calendar.getActualMaximum(Calendar.DATE); } /** * * @return */ public static final int getlastDateofThisMonth() { return getlastDateofThisMonth(-1, -1); } }