Java HTTP Port Find canConnect(String host, int port)

Description

can Connect

License

Open Source License

Declaration

public static boolean canConnect(String host, int port) 

Method Source Code

//package com.java2s;
/**/*from   w  w w  .ja  v  a2s. c  o  m*/
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * 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.io.IOException;

import java.net.InetSocketAddress;
import java.net.Socket;

public class Main {
    public static boolean canConnect(String host, int port) {
        InetSocketAddress localAddress = new InetSocketAddress(0);
        InetSocketAddress remoteAddress = new InetSocketAddress(host,
                Integer.valueOf(port));

        return _canConnect(localAddress, remoteAddress);
    }

    private static boolean _canConnect(InetSocketAddress localAddress,
            InetSocketAddress remoteAddress) {
        boolean connected = false;

        try (Socket socket = new Socket()) {
            socket.bind(localAddress);
            socket.connect(remoteAddress, 3000);
            socket.getInputStream();

            connected = true;
        } catch (IOException ioe) {
        }

        if (connected) {
            return true;
        }

        return false;
    }
}

Related

1. availableAndReturn(int MIN_PORT_NUMBER, int MAX_PORT_NUMBER)
2. availablePort()
3. availablePort(int port)
4. availablePort(int pPort)
5. availablePort(int prefered)
6. canConnect(String host, int port)
7. canConnectOn(String host, int port)
8. createUnresolved(String host, int port)
9. doSend(String command, String server, String port)