Java HTTP Port Find getAvailablePort(int prefferedPort)

Description

get Available Port

License

Apache License

Declaration

public static int getAvailablePort(int prefferedPort) 

Method Source Code

//package com.java2s;
/*/*w w  w.  jav a2s.  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 int getAvailablePort(int prefferedPort) {
        int localPort = -1;
        try (ServerSocket socket = new ServerSocket(prefferedPort)) {
            localPort = socket.getLocalPort();
        } catch (IOException exp) {
            if (prefferedPort > 0) {
                return getAvailablePort(0);
            }
        }
        return localPort;
    }

    public static int getAvailablePort() {
        return getAvailablePort(0);
    }
}

Related

1. getAvailablePort()
2. getAvailablePort(final int basePort)
3. getAvailablePort(int defaultPort)
4. getAvailablePort(int port)
5. getAvailablePort(int port)
6. getAvailablePort(int randomAttempts)
7. getAvailablePort(int startPort)
8. getAvailablePort(String hostname, String portRange)
9. getAvailablePorts(int basePort, int portCount)