final/TestPort.java

import java.net.Socket;

public class TestPort {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("127.0.0.1", 8081);
            System.out.println("Successfully connected to port 8081");
            socket.close();
        } catch (Exception e) {
            System.out.println("Failed to connect to port 8081: " + e.getMessage());
        }
    }
}