How to resolve the java net ConnectException in Java

Question

I am trying to establish a TCP connection, but I am getting java.net.ConnectionException. How to resolve it?

Answer 1

If you are getting java.net.ConnectionException, it means no port is listening your request.Following are the condition which will give this exception.

• You are trying to connect wrong port.
• You have not started your server.
• Your server is not listening to the request.

Before running the server:

• You should check the port number and host name.
• There should not be any firewall, which will restrict the connection.