The type Enum is not generic; it cannot be parameterized with arguments <RestClient.RequestMethod>

The type Enum is not generic; it cannot be parameterized with arguments <RestClient.RequestMethod>

I've this error in the following code ..

package ayanoo.utility;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.Vector;

    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.ClientProtocolException;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.client.methods.HttpUriRequest;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.protocol.HTTP;

    import android.util.Log;

    public class  RestClient {

     public enum RequestMethod
     {
     GET,
     POST
     }

        private Vector <NameValuePair> params;

        private String url;

        private int responseCode;
        private String message;

        private String response;

        public String getResponse() {
            return response;
        }

        public String getErrorMessage() {
            return message;
        }

        public int getResponseCode() {
            return responseCode;
        }

        public RestClient(String url)
        {
            this.url = url;
            params = new Vector<NameValuePair>();
        }

        public void AddParam(String name, String value)
        {
            params.add(new BasicNameValuePair(name, value));
        }

        public void Execute(RequestMethod method) throws IOException
        {
            switch(method) {
                case GET:
                {
                    //add parameters
                    String combinedParams = "";
                    if(!params.isEmpty()){
                        combinedParams += "/";
                        for(NameValuePair p : params)
                        {
                            //String paramString = p.getName() + "=" + p.getValue();
                         String paramString = p.getValue();
                            if(combinedParams.length() > 1)
                            {
                                combinedParams  +=  "&" + pa开发者_JS百科ramString;
                            }
                            else
                            {
                                combinedParams += paramString;
                            }
                        }
                    }

                    Log.d("URL See:",url + combinedParams);
                    URL urlObject = new URL(url + combinedParams);
                    //URL urlObject = new URL("http://www.aydeena.com/Services/Search.svc/JSON/SearchByText/1");

                    executeRequest(urlObject);
                    break;
                }
                case POST:
                {
                    HttpPost request = new HttpPost(url);

                    //add headers

                    if(!params.isEmpty()){
                        request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
                    }

                    executeRequest(request, url);
                    break;
                }
            }
        }

        private void executeRequest(URL urlObject) throws IOException{
         HttpURLConnection con = null;
         con = (HttpURLConnection) urlObject.openConnection();
            con.setReadTimeout(10000 /* milliseconds */);
            con.setConnectTimeout(15000 /* milliseconds */);
            con.setRequestMethod("GET");
            //con.addRequestProperty("Referer",
              //    "http://www.pragprog.com/titles/eband/hello-android");
            con.setDoInput(true);

            // Start the query
            con.connect();
            response = convertStreamToString(con.getInputStream());
            Log.d("Response:", response);
        }

        private void executeRequest(HttpUriRequest request, String url)
        {
            HttpClient client = new DefaultHttpClient();
            Log.d("Test URL:", url);

            HttpResponse httpResponse;

            try {
                httpResponse = client.execute(request);
                responseCode = httpResponse.getStatusLine().getStatusCode();
                message = httpResponse.getStatusLine().getReasonPhrase();

                HttpEntity entity = httpResponse.getEntity();

                if (entity != null) {

                    InputStream instream = entity.getContent();
                    response = convertStreamToString(instream);

                    // Closing the input stream will trigger connection release
                    instream.close();
                }

            } catch (ClientProtocolException e)  {
                client.getConnectionManager().shutdown();
                e.printStackTrace();
            } catch (IOException e) {
                client.getConnectionManager().shutdown();
                e.printStackTrace();
            }
        }

        private static String convertStreamToString(InputStream is) {

            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();

            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return sb.toString();
        }
    }

what's the problem ??? !

I had the same problem, and it turned out that it was because the standard lib was not in the eclipse class path for the project. Just go into Build Path -> Add Libraries and add the JRE System Library

Are you sure the Java compiler is set to 1.5 (default for android) or better? If you are using Eclipse you can see that from the preferences.

I had the same problem.

I only had one error in my project which was the "is not generic one'.

After I commented out the Enum code I found a lot more errors.

There seemed to be some kind of hold-up. Only after fixing the other errors and then removing the comments did it work.

Yes I also saw this error message for a project that was previously working fine.

I checked the compiler version (I am using 1.6) as well as the system library (it is already being used) to no avail.

Finally I just closed the project and then re-opened it, and then the problem went away. Sounds like an Eclipse bug to me.