创建一个插槽，将检查给定的 IP 特别端口可以连接或不

 公共静态布尔isPortOpen（最后弦乐IP，最终诠释口，最终诠释超时）{
        尝试 {
            Socket套接字=新的Socket（）;
            socket.connect（新InetSocketAddress（IP，端口），超时）;
            socket.close（）;
            返回true;
        }

        赶上（的ConnectException CE）{
            ce.printStackTrace（）;
            返回false;
        }

        赶上（例外前）{
            ex.printStackTrace（）;
            返回false;
        }
    }
 

I am trying to connect to a my remote server from my Android device. How do I check if a specific port on my server is open? Eg. how to check if port 80 is open on my server 11.11.11.11?

Currently, I am using InetAddress to ping if the host is reachable but this does not tell me if the port 80 is open.

Current Code

boolean isAvailable = false;
try {
    isAvailable = InetAddress.getByName("11.11.11.11").isReachable(2000);
    if (isAvailable == true) {
       //host is reachable
       doSomething();
    }
} catch (Exception e) {

}

Create a Socket that will check that the given ip with particular port could be connected or not.

public static boolean isPortOpen(final String ip, final int port, final int timeout) {
        try {
            Socket socket = new Socket();
            socket.connect(new InetSocketAddress(ip, port), timeout);
            socket.close();
            return true;
        } 

        catch(ConnectException ce){
            ce.printStackTrace();
            return false;
        }

        catch (Exception ex) {
            ex.printStackTrace();
            return false;
        }
    }