the address of all connected machines to the network

hi,
how can I find the adress of all connected machines to the network,with InetAdress and thanks for any help :-<

What did you try so far? Did you try to google it?

InetAddress IPaddress = InetAddress.getByName(ipaddr);
ServerSocket serverSocket = new ServerSocket(Integer.parseInt(serverPort, 0, IPaddress);