当在给定主机上既不存在适当的DNS查找也不存在/ETC/HOST条目的环境下使用Java.NET.NETAdvuleGeToStOrthMeNe（）方法时，

/**

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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.

 */

//package com.nowjava;

import java.net.InetAddress;
/**
来 自 nowjava
**/

import java.net.UnknownHostException;


public class Main {

    public static void main(String[] argv) throws Exception {

        System.out.println(getLocalHostName());

    }


    /**

     * When using the {@link java.net.InetAddress#getHostName()} method in an

     * environment where neither a proper DNS lookup nor an <tt>/etc/hosts</tt>

     * entry exists for a given host, the following exception will be thrown:

     * <code>

     * java.net.UnknownHostException: &lt;hostname&gt;: &lt;hostname&gt;

     *  at java.net.InetAddress.getLocalHost(InetAddress.java:1425)

     *   ...

     * </code>

     * Instead of just throwing an UnknownHostException and giving up, this

     * method grabs a suitable hostname from the exception and prevents the

     * exception from being thrown. If a suitable hostname cannot be acquired

     * from the exception, only then is the <tt>UnknownHostException</tt> thrown.

     *

     * @return The hostname

     * @throws UnknownHostException

     * @see {@link java.net.InetAddress#getLocalHost()}

     * @see {@link java.net.InetAddress#getHostName()}

     */

    public static String getLocalHostName() throws UnknownHostException {

        try {// 来自 N o w  J a v a  . c o m

            return (InetAddress.getLocalHost()).getHostName();

        } catch (UnknownHostException uhe) {