将InetAddress转换为字符串

Question

Im using a hashtable to save filename (string) and InetAddress

Hashtable <String , InetAddress > file_location = new Hashtable <String , InetAddress >(); 

and im using this to retrieve the address, but im only getting a null value returned

file_location.put("ABD_9158" , IPAddress); //IPAdress is of InetAddress type

 InetAddress n = file_location.get("ABD_9158");

        System.out.println(n);

tried changing n to a string but , havent been able to find away my question, how do retrieve the ipaddress ?

Answer 1

This is a small program, to check what you want. Same piece of code, what you have shared, it is working fine.

 public static void main(String args[]) {
        Hashtable<String, InetAddress> fileLocation = new Hashtable<String, InetAddress>();
        InetAddress addr;
        try {
            addr = InetAddress.getByName("127.0.0.1");
            fileLocation.put("ABD_9158", addr); // IPAdress is of InetAddress type
            InetAddress n = fileLocation.get("ABD_9158");
            System.out.println(n);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }

Output

/127.0.0.1