Here you can find the source of isLastDayOfMonth(Calendar cal)
static public boolean isLastDayOfMonth(Calendar cal)
//package com.java2s; /*//from w w w . j av a 2s . co m * Copyright 2012 ReachLocal Inc. * * 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 { static public boolean isLastDayOfMonth(Calendar cal) { int m1 = cal.get(Calendar.MONTH); cal.add(Calendar.DAY_OF_MONTH, 1); int m2 = cal.get(Calendar.MONTH); cal.add(Calendar.DAY_OF_MONTH, -1); return m1 != m2; } }