How to retrieve specific JIRA Fields in Java using RESTAPI

[Vikas jagadale]

/**
Jars used: 
jersey-bundle-1.9.jar (https://mvnrepository.com/artifact/com.sun.jersey/jersey-bundle/1.9)
javax.ws.rs-api-2.0-m02.jar (https://mvnrepository.com/artifact/javax.ws.rs/javax.ws.rs-api/2.0-m02)
*/

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.core.util.Base64;
public class JiraData {
static ClientResponse response;

public static void main(String[] args) {


try
{

String auth = new String(Base64.encode("username" + ":" + "password"));
final String headerAuthorization = "Authorization";
final String headerAuthorizationValue = "Basic " + auth;
final String headerType = "application/json";
Client c = Client.create();


WebResource webResource = c.resource("https://jira.com");
response = webResource.header(headerAuthorization, headerAuthorizationValue).type(headerType).accept(headerType).get(ClientResponse.class);
String connectionresult = response.toString();
System.out.println(connectionresult); // returned a response status of 200 OK

if (response.getResponseStatus() != null && response.getResponseStatus().getStatusCode() == 200)
{
System.out.println("Connection Successful");
fetchFields();
}


}

catch(Exception e)
{
System.out.println(" Connection Error " + e);
}




}

private static void fetchFields() {

try
{

String jql = "project = SAMPLE";
/*
* Missing logic to Capture Jira fields like Ticket Number, Ticket URL, Issue Type, Ticket Status for project passed in jql
*/


}

catch(Exception e)
{
System.out.println(" Error from fetchFields method " + e);
}

finally
{
response.close();

}


}

}

 So far I am able to only establish a connection with Jira, but I don't know how I can fetch specific fields. Any help would be really appreciated.