The type List is not generic it cannot be parameterized with arguments HTTPClient

Question

import java awt List  import java awt image BufferedImage  import java io BufferedReader  import java io ByteArrayOutputStream  import java io File  import java io InputStreamReader  import java util ArrayList   import javax imageio ImageIO   import org apache commons codec binary Base64  import org apache http HttpResponse  import org apache http client HttpClient  import org apache http client entity UrlEncodedFormEntity  import org apache http client methods HttpPost  import org apache http impl client DefaultHttpClient  import org apache http message BasicNameValuePair  import org omg DynamicAny NameValuePair   public class Upload        public static void main  String   args             System out println Imgur  C   Users  username  Desktop  image jpg        clientID            public static String Imgur  String imageDir  String clientID          create needed strings     String address    https   api imgur com 3 image          Create HTTPClient and post     HttpClient client   new DefaultHttpClient        HttpPost post   new HttpPost address          create base64 image     BufferedImage image   null      File file   new File imageDir        try             read image         image   ImageIO read file           ByteArrayOutputStream byteArray   new ByteArrayOutputStream            ImageIO write image   png   byteArray           byte   byteImage   byteArray toByteArray            String dataImage   new Base64   encodeAsString byteImage              add header         post addHeader  Authorization    Client-ID    clientID             add image         List lt NameValuePair gt  nameValuePairs   new ArrayList lt NameValuePair gt  1           nameValuePairs add new BasicNameValuePair  image   dataImage            post setEntity new UrlEncodedFormEntity nameValuePairs               execute         HttpResponse response   client execute post              read response         BufferedReader rd   new BufferedReader new         InputStreamReader response getEntity   getContent              String all   null             loop through response         while  rd readLine      null                all   all           rd readLine                        return all             catch  Exception e           return  error      e toString                So I have that code and I got it from uploading to Imgur v3 using Java https errors and I get an error on line 50 for  List  telling me     The type List is not generic  it cannot be parameterized with arguments    What can I do to solve this   I m using http   hc apache org httpclient-3 x  and want to upload an image to imgur using their v3 API   EDIT  After changing the import I now get these errors   That solves that but give me two more errors    nameValuePairs add new BasicNameValuePair  image   dataImage         The method add NameValuePair  in the type List is not applicable for the arguments  BasicNameValuePair    And  post setEntity new UrlEncodedFormEntity nameValuePairs         The constructor UrlEncodedFormEntity List  is undefined

User · Answer

I got the same error  but when i did as below  it resolved the issue  Instead of writing like this   List lt NameValuePair gt  nameValuePairs   new ArrayList lt NameValuePair gt  1     use the below one           ArrayList lt NameValuePair gt  nameValuePairs   new ArrayList lt NameValuePair gt  1

User · Answer

Adding java util list will resolve your problem because List interface which you are trying to use is part of java util list package

User · Answer

Try to import  java util List    instead of  java awt List

User · Answer

Your import has a subtle error    import java awt List     It should be   import java util List    The problem is that both awt and Java s util package provide a class called List  The former is a display element  the latter is a generic type used with collections  Furthermore  java util ArrayList extends java util List  not java awt List so if it wasn t for the generics  it would have still been a problem   Edit   to address further questions given by OP  As an answer to your comment  it seems that there is anther subtle import issue    import org omg DynamicAny NameValuePair    should be   import org apache http NameValuePair   nameValuePairs now uses the correct generic type parameter  the generic argument for new UrlEncodedFormEntity  which is List lt   extends NameValuePair gt   becomes valid  since your NameValuePair is now the same as their NameValuePair  Before  org omg DynamicAny NameValuePair did not extend org apache http NameValuePair and the shortened type name NameValuePair evaluated to org omg    in your file  but org apache    in their code

[java] The type List is not generic; it cannot be parameterized with arguments [HTTPClient]

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