Java HTTP Port Find getAvailablePort()

Description

get Available Port

License

Apache License

Declaration

public static int getAvailablePort() throws IOException 

Method Source Code

//package com.java2s;
/*/*from   www.  j av  a2 s .c o m*/
 * 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 int getAvailablePort() throws IOException {
        for (int i = 0; i < 50; i++) {
            ServerSocket serverSocket = null;
            try {
                serverSocket = new ServerSocket(0);
                int port = serverSocket.getLocalPort();
                if (port != 0) {
                    return port;
                }
            } finally {
                serverSocket.close();
            }
        }

        throw new IOException("could not find free port");
    }
}

Related

1. getAvailablePort()
2. getAvailablePort()
3. getAvailablePort()
4. getAvailablePort()
5. getAvailablePort()
6. getAvailablePort()
7. getAvailablePort()
8. getAvailablePort(final int basePort)
9. getAvailablePort(int defaultPort)