How to check whether the particular port is in use : Java

When i was working on a WIX, i encountered some issue in installing the application  (REST based webservice), my service is not started and later identified that the port number which i set in the application is already used by another application

To identify whether the port is in use, i used the Socket Class in Java, which is an endpoint for communication between two machines but i used for local machine to validate specified port
public Socket(String host, int port) throws UnknownHostException, IOException

See the gist on github.

if the host is null it will set the host as loopback address

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