JAVA method call to Thread

gistfile1.txt

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.client.RestTemplate;

import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

@Slf4j
public class RestCallToThread {

    public void callUpload(String url, Map<String, Object> parameter){

        ExecutorService executorService = Executors.newFixedThreadPool(3);

        executorService.submit(() -> {
            RestTemplate restTemplate = new RestTemplate();
            restTemplate.postForObject(url, parameter, String.class);
        });
        executorService.shutdown();
    }
}