Here you can find the source of validateMonth(int month)
private static void validateMonth(int month)
//package com.java2s; /* //from w w w . j a v a 2s. com * Copyright 2001-2009 James House * * 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. * */ public class Main { private static void validateMonth(int month) { if (month < 1 || month > 12) { throw new IllegalArgumentException("Invalid month (must be >= 1 and <= 12."); } } }