1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package java.net;
19
20import java.io.IOException;
21
22/**
23 * Thrown when a hostname can not be resolved.
24 */
25public class UnknownHostException extends IOException {
26
27    private static final long serialVersionUID = -4639126076052875403L;
28
29    /**
30     * Constructs a new {@code UnknownHostException} instance with no detail message.
31     * Callers should usually supply a detail message.
32     */
33    public UnknownHostException() {
34    }
35
36    /**
37     * Constructs a new {@code UnknownHostException} instance with the given detail message.
38     * The detail message should generally contain the hostname and a reason for the failure,
39     * if known.
40     *
41     * @param detailMessage
42     *            the detail message for this exception.
43     */
44    public UnknownHostException(String detailMessage) {
45        super(detailMessage);
46    }
47}
48