Here you can find the source of createServerSocket()
public static ServerSocket createServerSocket() throws IOException
//package com.java2s; /*//from w ww. j a v a 2 s .com * 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. */ import java.io.IOException; import java.net.ServerSocket; public class Main { public static final int PORT = Integer.parseInt(System.getProperty("org.wildfly.openssl.test.port", "7677")); public static ServerSocket createServerSocket() throws IOException { return createServerSocket(PORT); } public static ServerSocket createServerSocket(final int port) throws IOException { ServerSocket serverSocket = new ServerSocket(port); serverSocket.setReuseAddress(true); return serverSocket; } }