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 18 package java.net; 19 20 import java.io.IOException; 21 22 /** 23 * Thrown when a hostname can not be resolved. 24 */ 25 public 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 */ UnknownHostException()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 */ UnknownHostException(String detailMessage)44 public UnknownHostException(String detailMessage) { 45 super(detailMessage); 46 } 47 } 48