安卓dns解析是多线程的吗

import okhttp3.*;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MultiThreadedDNSResolver {
    private static final OkHttpClient client = new OkHttpClient.Builder()
            .dns(new Dns() {
                @Override
                public List<InetAddress> lookup(String hostname) throws UnknownHostException {
                    return Dns.SYSTEM.lookup(hostname);
                }
            })
            .build();

    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(10);

        for (int i = 0; i < 10; i++) {
            executorService.submit(() -> {
                Request request = new Request.Builder()
                        .url("https://example.com")
                        .build();

                try (Response response = client.newCall(request).execute()) {
                    System.out.println(response.body().string());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            });
        }

        executorService.shutdown();
    }
}