diff --git a/app/src/main/java/com/example/cosmosclient/entities/ToJoinGroupRetrofitMethods.java b/app/src/main/java/com/example/cosmosclient/entities/ToJoinGroupRetrofitMethods.java
deleted file mode 100644
index 65bf3ae..0000000
--- a/app/src/main/java/com/example/cosmosclient/entities/ToJoinGroupRetrofitMethods.java
+++ /dev/null
@@ -1,81 +0,0 @@
-package com.example.cosmosclient.entities;
-
-import android.content.Intent;
-import android.support.v7.app.AppCompatActivity;
-import android.widget.Toast;
-
-import com.example.cosmosclient.app.Cosmos;
-import com.example.cosmosclient.resources.JoinGroupRest;
-import com.example.cosmosclient.resources.UsersRest;
-import com.example.cosmosclient.views.GroupListActivity;
-import com.example.cosmosclient.views.JoinGroupActionsActivity;
-import com.example.cosmosclient.views.SignupActivity;
-
-import retrofit2.Call;
-import retrofit2.Callback;
-import retrofit2.Response;
-import retrofit2.Retrofit;
-import retrofit2.converter.jackson.JacksonConverterFactory;
-import retrofit2.http.Field;
-import retrofit2.http.FormUrlEncoded;
-import retrofit2.http.POST;
-import retrofit2.http.Path;
-import retrofit2.http.Query;
-
-public class ToJoinGroupRetrofitMethods extends AppCompatActivity {
-    public ToJoinGroupRetrofitMethods() {
-
-    }
-//    public String runRetrofit() {
-//        //retrofitの処理
-//        final Retrofit retrofit = new Retrofit.Builder()
-//                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/")
-//                .addConverterFactory(JacksonConverterFactory.create())
-//                .build();
-//        //interfaceから実装を取得
-//        final JoinGroupRest joinGroupService = retrofit.create(JoinGroupRest.class);
-//
-//        String gid="dnjewvhoirae";
-//        String uid="dnjewvhfgoirae";
-//        String token="dnjewvhoidgfrae";
-//        //API呼び出しのための値入力
-//        Call<JoinGroupResponse> call = joinGroupService.JoinGroup(gid, uid, token);
-//
-//        //サーバからデータ受け取り
-//        call.enqueue(new Callback<JoinGroupResponse>() {
-//            //成功時
-//            @Override
-//            public void onResponse(Call<JoinGroupResponse> call, Response<JoinGroupResponse> response) {
-//                if (response.isSuccessful()) {
-//                    JoinGroupResponse result = response.body();
-//
-//                    Cosmos app = (Cosmos) getApplication();
-//                    Intent intent = new Intent(getApplication(), GroupListActivity.class);
-//
-//                    //test
-////                            System.out.println(result.uId);
-////                            System.out.println(result.name);
-////                            System.out.println(result.uri);
-////                            System.out.println(result.token);
-////                            System.out.println(result.iconUri);
-////                            System.out.println(result.pw);
-//
-//                   //ここで成功の処理を記述
-//                    finish();
-//
-//                } else {
-//                    //onFailureでキャッチできないエラー用
-//                    //ここでエラーの処理を記述
-//                }
-//            }
-//
-//
-//            //失敗時
-//            @Override
-//            public void onFailure(Call<JoinGroupResponse> call, Throwable t) {
-//                String errertxt = "errer";
-//                return errertxt;
-//            }
-//        });
-//    }
-}