Here you can find the source of isUnresolved(SocketAddress address)
public static boolean isUnresolved(SocketAddress address)
//package com.java2s; /*/*from w w w . j a v a 2s .c o m*/ * Copyright 2010-2012 Roger Kapsi * * 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. */ import java.net.InetSocketAddress; import java.net.SocketAddress; public class Main { /** * Returns {@code true} if the given {@link SocketAddress} is unresolved. */ public static boolean isUnresolved(SocketAddress address) { return ((InetSocketAddress) address).isUnresolved(); } }