How to call API (Oauth 1.0)?

I am trying to call this API (Oauth1.0 standard):

https://appcenter.intuit.com/api/v1/Connection/Reconnect

And what I am doing is : (It am working on java)

Base64Encoder baseEncoder = Base64Encoder.getInstance();
            CloseableHttpClient httpclient = HttpClients.createDefault();
            HttpGet httpGet = new HttpGet("https://appcenter.intuit.com/api/v1/connection/reconnect");
            StringBuilder headerReq = new StringBuilder();
            headerReq.append("OAuth ");
            headerReq.append("oauth_token=\"").append(OAUTHTOKEN).append("\"");
            headerReq.append(", oauth_consumer_key=\"").append(CUNSUMER_KEY).append("\"");
            headerReq.append(", oauth_signature_method=\"base64\"");
            headerReq.append(", oauth_signature=\"")          .append(baseEncoder.encode(PropsUtil.get(OAUTH_CONSUMER_SECRET).getBytes()))
                    .append(baseEncoder.encode("&".getBytes()))            .append(baseEncoder.encode(symmetricEncrypter.decryptData(OAUTH_TOKEN_SECRET).getBytes())).append("\"");
            headerReq.append(", oauth_version=\"1.0\"");
            httpGet.addHeader("Authorization", headerReq.toString());
            CloseableHttpResponse response = httpclient.execute(httpGet);
            try {
                System.out.println("Responsee::"+ response.getStatusLine());
}

And, the response what I am getting is:

<?xml version="1.0" encoding="utf-8"?>
<PlatformResponse xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://platform.intuit.com/api/v1">
  <ErrorMessage>This API requires Authorization.</ErrorMessage>
  <ErrorCode>22</ErrorCode>

Can you please suggest me what I am missing while creating request for Oauth1.0 standard or Please, anyone can provide me the sample code of Oauth1.0 request example on that standard.

Thank you very much.

PFB working code. Hope it will be useful.

import java.io.InputStream;
import java.io.StringWriter;
import java.net.URI;
import java.net.URISyntaxException;

import oauth.signpost.OAuthConsumer;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import oauth.signpost.exception.OAuthCommunicationException;
import oauth.signpost.exception.OAuthExpectationFailedException;
import oauth.signpost.exception.OAuthMessageSignerException;
import oauth.signpost.signature.AuthorizationHeaderSigningStrategy;

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.DefaultHttpClient;

import com.intuit.ipp.data.Account;
import com.intuit.ipp.exception.FMSException;
import com.intuit.ipp.net.MethodType;
import com.intuit.ipp.services.DataService;

public class POCWithoutDevkitTest {

    private DataService service;
    private OAuthConsumer oAuthConsumer;
    private static String realmID = null;

    public POCWithoutDevkitTest() {
        realmID = "122294642099";
        String consumerKey = "AAAAA";
        String consumerSecret = "BBBBB";
        String accessToken = "CCCCC";
        String accessTokenSecret = "DDDDD";

        setupContext(consumerKey, consumerSecret, accessToken, accessTokenSecret);
    }

    public void setupContext(String consumerKey, String consumerSecret, String accessToken, String accessTokenSecret) {
            this.oAuthConsumer = new CommonsHttpOAuthConsumer(consumerKey, consumerSecret);
            oAuthConsumer.setTokenWithSecret(accessToken, accessTokenSecret);
            oAuthConsumer.setSigningStrategy(new AuthorizationHeaderSigningStrategy());
    }

    public void authorize(HttpRequestBase httpRequest) throws FMSException {
        try {
            oAuthConsumer.sign(httpRequest);
        } catch (OAuthMessageSignerException e) {
            throw new FMSException(e);
        } catch (OAuthExpectationFailedException e) {
            throw new FMSException(e);
        } catch (OAuthCommunicationException e) {
            throw new FMSException(e);
        }
    }

    public void executeGetRequest(String customURIString){
        DefaultHttpClient client = new DefaultHttpClient();
        client.getParams().setParameter("http.protocol.content-charset", "UTF-8");

        HttpRequestBase httpRequest = null;
        URI uri = null;

        try {
            uri = new URI(customURIString);
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }

        String methodtype = "GET";

        if (methodtype.equals(MethodType.GET.toString())) {
            httpRequest = new HttpGet(uri);
        }

        httpRequest.addHeader("content-type", "application/xml");
        httpRequest.addHeader("Accept","application/xml");

        try {
            authorize(httpRequest);
        } catch (FMSException e) {
            e.printStackTrace();
        }


        HttpResponse httpResponse = null;
        try {
            HttpHost target = new HttpHost(uri.getHost(), -1, uri.getScheme());
            httpResponse = client.execute(target, httpRequest);
            System.out.println("Connection status : " + httpResponse.getStatusLine());

            InputStream inputStraem = httpResponse.getEntity().getContent();

            StringWriter writer = new StringWriter();
            IOUtils.copy(inputStraem, writer, "UTF-8");
            String output = writer.toString();

            System.out.println(output);
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    public static void main(String args[]) {
        POCWithoutDevkitTest withoutDevkitClient = new POCWithoutDevkitTest();
        withoutDevkitClient.executeGetRequest("https://appcenter.intuit.com/api/v1/connection/reconnect");
    }

}

Dependencies

    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpcore</artifactId>
        <version>4.3.1</version>
    </dependency>
    <dependency>
        <groupId>oauth.signpost</groupId>
        <artifactId>signpost-core</artifactId>
        <version>1.2.1.1</version>
    </dependency>
    <dependency>
        <groupId>oauth.signpost</groupId>
        <artifactId>signpost-commonshttp4</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpmime</artifactId>
        <version>4.3.1</version>
    </dependency>

Thanks