Java

DNS Query MX Records

See more DNS Examples

Shows how to perform a DNS query to retrieve MX records.

Note: This example requires Chilkat v9.5.0.96 or later.

Chilkat2 Java

import com.chilkatsoft.chilkat2.Dns;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        Dns dns = new Dns();

        JsonObject json = new JsonObject();
        json.setEmitCompact(false);

        success = dns.query("MX", "somebody@gmail.com", json);
        if (!success) {
            System.out.println(dns.getLastErrorText());
            return;
        }

        System.out.println(json.emit());

        // Sample response.
        // Parsing code below..

        // -------------------------------------------------------------------------------
        // Note: Chilkat will return the results sorted by "pref" from lowest to highest.
        // -------------------------------------------------------------------------------

        // {
        //   "answer": {
        //     "mx": [
        //       {
        //         "name": "gmail.com",
        //         "ttl": 491,
        //         "pref": 5,
        //         "domain": "gmail-smtp-in.l.google.com"
        //       },
        //       {
        //         "name": "gmail.com",
        //         "ttl": 491,
        //         "pref": 10,
        //         "domain": "alt1.gmail-smtp-in.l.google.com"
        //       },
        //       {
        //         "name": "gmail.com",
        //         "ttl": 491,
        //         "pref": 20,
        //         "domain": "alt2.gmail-smtp-in.l.google.com"
        //       },
        //       {
        //         "name": "gmail.com",
        //         "ttl": 491,
        //         "pref": 30,
        //         "domain": "alt3.gmail-smtp-in.l.google.com"
        //       },
        //       {
        //         "name": "gmail.com",
        //         "ttl": 491,
        //         "pref": 40,
        //         "domain": "alt4.gmail-smtp-in.l.google.com"
        //       }
        //     ]
        //   }
        // }

        // Use this online tool to generate parsing code from sample JSON:
        // Generate Parsing Code from JSON

        String name = "";
        int ttl = 0;
        int pref = 0;
        String domain = "";

        int i = 0;
        int count_i = json.sizeOfArray("answer.mx");
        while (i < count_i) {
            json.setI(i);
            name = json.stringOf("answer.mx[i].name");
            ttl = json.intOf("answer.mx[i].ttl");
            pref = json.intOf("answer.mx[i].pref");
            domain = json.stringOf("answer.mx[i].domain");
            i = i + 1;
        }
    }
}