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验证端口值是否在范围内（1-65535）
/* * JMule - Java file sharing client * Copyright (C) 2007-2008 JMule team ( jmule@jmule.org / http://jmule.org ) * * Any parts of this program derived from other projects, or contributed * by third-party developers are copyrighted by their respective authors. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ //package com.nowjava; /* N o w J a v a . c o m 提 供 */ public class Main { public static void main(String[] argv) throws Exception { int port = 2; System.out.println(isPortInRange(port)); } /** * Validates a port value if it is in range ( 1 - 65535 ) * * @param port the port to verify in int value. Unsigned short ports must be * converted to singned int to let this function work correctly. * @return true if the port is in range, false otherwise. */ public static boolean isPortInRange(int port) { return (port & 0xFFFF0000) == 0 && port != 0; } public static boolean isPortInRange(