Here you can find the source of getLastDay(Date targetDate, Calendar cal)
public static int getLastDay(Date targetDate, Calendar cal)
//package com.java2s; /*// w ww . ja va2s. c o m * Copyright 2012 Kazumune Katagiri. (http://d.hatena.ne.jp/nemuzuka) * * 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.Calendar; import java.util.Date; public class Main { public static int getLastDay(Date targetDate, Calendar cal) { cal.setTime(targetDate); return cal.getActualMaximum(Calendar.DATE); } }