diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
index 0d707c5b39..26eb2c8a33 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
@@ -438,12 +438,13 @@ public class ApiClient {
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
    *   application/vnd.company+json
+   * "* / *" is also default to JSON
    * @param mime MIME
    * @return True if the MIME type is JSON
    */
   public boolean isJsonMime(String mime) {
     String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-    return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache
index 24d0c89d10..94f89a56dd 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache
@@ -571,12 +571,13 @@ public class ApiClient {
      *   application/json; charset=UTF8
      *   APPLICATION/JSON
      *   application/vnd.company+json
+     * "* / *" is also default to JSON
      * @param mime MIME (Multipurpose Internet Mail Extensions)
      * @return True if the given MIME is JSON, false otherwise.
      */
     public boolean isJsonMime(String mime) {
       String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-      return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+      return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
     }
 
     /**
diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
index 9ca31c6073..b41f31903b 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/resteasy/ApiClient.mustache
@@ -377,9 +377,13 @@ public class ApiClient {
    *   application/json
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
+   *   application/vnd.company+json
+   * @param mime MIME (Multipurpose Internet Mail Extensions)
+   * @return True if the given MIME is JSON, false otherwise.
    */
   public boolean isJsonMime(String mime) {
-    return mime != null && mime.matches("(?i)application\\/json(;.*)?");
+    String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
index 0177d25b78..567fc6d25d 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/resttemplate/ApiClient.mustache
@@ -424,6 +424,11 @@ public class ApiClient {
     * @return boolean true if the MediaType represents JSON, false otherwise
     */
     public boolean isJsonMime(String mediaType) {
+        // "* / *" is default to JSON
+        if ("*/*".equals(mediaType)) {
+            return true;
+        }
+
         try {
             return isJsonMime(MediaType.parseMediaType(mediaType));
         } catch (InvalidMediaTypeException e) {
diff --git a/samples/client/petstore/java/feign/gradlew b/samples/client/petstore/java/feign/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Order.java
index 2edfd83b31..adcd2b0d82 100644
--- a/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/feign/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/jersey1/gradlew b/samples/client/petstore/java/jersey1/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/ApiClient.java
index 7a3082bef6..c62ed807dc 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/ApiClient.java
@@ -512,10 +512,10 @@ public class ApiClient {
    *
    * @param contentTypes The Content-Type array to select from
    * @return The Content-Type header to use. If the given array is empty,
-   *   JSON will be used.
+   *   or matches "any", JSON will be used.
    */
   public String selectHeaderContentType(String[] contentTypes) {
-    if (contentTypes.length == 0) {
+    if (contentTypes.length == 0 || contentTypes[0].equals("*/*")) {
       return "application/json";
     }
     for (String contentType : contentTypes) {
diff --git a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Order.java
index 2edfd83b31..adcd2b0d82 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/jersey2-java6/gradlew b/samples/client/petstore/java/jersey2-java6/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/ApiClient.java
index 42f3a9c702..b3cd7018ac 100644
--- a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/ApiClient.java
@@ -432,12 +432,13 @@ public class ApiClient {
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
    *   application/vnd.company+json
+   * "* / *" is also default to JSON
    * @param mime MIME
    * @return True if the MIME type is JSON
    */
   public boolean isJsonMime(String mime) {
     String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-    return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Cat.java
index ea4a0e3e8d..fe1f0ce994 100644
--- a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Order.java
index 32de914a76..7db40bf275 100644
--- a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/jersey2-java8/gradlew b/samples/client/petstore/java/jersey2-java8/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/ApiClient.java
index 3a898f314a..c9b0a51e0d 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/ApiClient.java
@@ -13,8 +13,8 @@ import javax.ws.rs.core.Response.Status;
 
 import org.glassfish.jersey.client.ClientConfig;
 import org.glassfish.jersey.client.ClientProperties;
-import org.glassfish.jersey.filter.LoggingFilter;
 import org.glassfish.jersey.jackson.JacksonFeature;
+import org.glassfish.jersey.logging.LoggingFeature;
 import org.glassfish.jersey.media.multipart.FormDataBodyPart;
 import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
 import org.glassfish.jersey.media.multipart.MultiPart;
@@ -51,21 +51,21 @@ import io.swagger.client.auth.OAuth;
 
 
 public class ApiClient {
-  private Map<String, String> defaultHeaderMap = new HashMap<String, String>();
-  private String basePath = "http://petstore.swagger.io:80/v2";
-  private boolean debugging = false;
-  private int connectionTimeout = 0;
+  protected Map<String, String> defaultHeaderMap = new HashMap<String, String>();
+  protected String basePath = "http://petstore.swagger.io:80/v2";
+  protected boolean debugging = false;
+  protected int connectionTimeout = 0;
 
-  private Client httpClient;
-  private JSON json;
-  private String tempFolderPath = null;
+  protected Client httpClient;
+  protected JSON json;
+  protected String tempFolderPath = null;
 
-  private Map<String, Authentication> authentications;
+  protected Map<String, Authentication> authentications;
 
-  private int statusCode;
-  private Map<String, List<String>> responseHeaders;
+  protected int statusCode;
+  protected Map<String, List<String>> responseHeaders;
 
-  private DateFormat dateFormat;
+  protected DateFormat dateFormat;
 
   public ApiClient() {
     json = new JSON();
@@ -433,12 +433,13 @@ public class ApiClient {
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
    *   application/vnd.company+json
+   * "* / *" is also default to JSON
    * @param mime MIME
    * @return True if the MIME type is JSON
    */
   public boolean isJsonMime(String mime) {
     String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-    return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
@@ -729,18 +730,26 @@ public class ApiClient {
    * @param debugging Debug setting
    * @return Client
    */
-  private Client buildHttpClient(boolean debugging) {
+  protected Client buildHttpClient(boolean debugging) {
     final ClientConfig clientConfig = new ClientConfig();
     clientConfig.register(MultiPartFeature.class);
     clientConfig.register(json);
     clientConfig.register(JacksonFeature.class);
     if (debugging) {
-      clientConfig.register(new LoggingFilter(java.util.logging.Logger.getLogger(LoggingFilter.class.getName()), true));
+      clientConfig.register(new LoggingFeature(java.util.logging.Logger.getLogger(LoggingFeature.DEFAULT_LOGGER_NAME), java.util.logging.Level.INFO, LoggingFeature.Verbosity.PAYLOAD_ANY, 1024*50 /* Log payloads up to 50K */));
+      clientConfig.property(LoggingFeature.LOGGING_FEATURE_VERBOSITY, LoggingFeature.Verbosity.PAYLOAD_ANY);
+      // Set logger to ALL
+      java.util.logging.Logger.getLogger(LoggingFeature.DEFAULT_LOGGER_NAME).setLevel(java.util.logging.Level.ALL);
     }
+    performAdditionalClientConfiguration(clientConfig);
     return ClientBuilder.newClient(clientConfig);
   }
 
-  private Map<String, List<String>> buildResponseHeaders(Response response) {
+  protected void performAdditionalClientConfiguration(ClientConfig clientConfig) {
+    // No-op extension point
+  }
+
+  protected Map<String, List<String>> buildResponseHeaders(Response response) {
     Map<String, List<String>> responseHeaders = new HashMap<String, List<String>>();
     for (Entry<String, List<Object>> entry: response.getHeaders().entrySet()) {
       List<Object> values = entry.getValue();
@@ -758,7 +767,7 @@ public class ApiClient {
    *
    * @param authNames The authentications to apply
    */
-  private void updateParamsForAuth(String[] authNames, List<Pair> queryParams, Map<String, String> headerParams) {
+  protected void updateParamsForAuth(String[] authNames, List<Pair> queryParams, Map<String, String> headerParams) {
     for (String authName : authNames) {
       Authentication auth = authentications.get(authName);
       if (auth == null) throw new RuntimeException("Authentication undefined: " + authName);
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/api/PetApi.java b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/api/PetApi.java
index c8f8b730ca..abac5af4ad 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/api/PetApi.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/api/PetApi.java
@@ -168,6 +168,7 @@ public class PetApi {
    * @param tags Tags to filter by (required)
    * @return List&lt;Pet&gt;
    * @throws ApiException if fails to make API call
+   * @Deprecated
    */
   public List<Pet> findPetsByTags(List<String> tags) throws ApiException {
     Object localVarPostBody = null;
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Order.java
index 93586da486..2df787c40a 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/jersey2/gradlew b/samples/client/petstore/java/jersey2/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
index 63d5f5c226..c9b0a51e0d 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
@@ -433,12 +433,13 @@ public class ApiClient {
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
    *   application/vnd.company+json
+   * "* / *" is also default to JSON
    * @param mime MIME
    * @return True if the MIME type is JSON
    */
   public boolean isJsonMime(String mime) {
     String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-    return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
diff --git a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Order.java
index 2edfd83b31..adcd2b0d82 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/gradlew b/samples/client/petstore/java/okhttp-gson-parcelableModel/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/ApiClient.java
index 0a2fa40147..90bc07435c 100644
--- a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/ApiClient.java
@@ -552,12 +552,13 @@ public class ApiClient {
      *   application/json; charset=UTF8
      *   APPLICATION/JSON
      *   application/vnd.company+json
+     * "* / *" is also default to JSON
      * @param mime MIME (Multipurpose Internet Mail Extensions)
      * @return True if the given MIME is JSON, false otherwise.
      */
     public boolean isJsonMime(String mime) {
       String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-      return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+      return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
     }
 
     /**
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Cat.java
index f2c67bca7c..8b05666d75 100644
--- a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Cat.java
@@ -44,7 +44,7 @@ public class Cat extends Animal implements Parcelable {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Order.java
index b53b9e204a..530643ab4e 100644
--- a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/model/Order.java
@@ -198,7 +198,7 @@ public class Order implements Parcelable {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/okhttp-gson/gradlew b/samples/client/petstore/java/okhttp-gson/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiClient.java
index 0a2fa40147..90bc07435c 100644
--- a/samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiClient.java
@@ -552,12 +552,13 @@ public class ApiClient {
      *   application/json; charset=UTF8
      *   APPLICATION/JSON
      *   application/vnd.company+json
+     * "* / *" is also default to JSON
      * @param mime MIME (Multipurpose Internet Mail Extensions)
      * @return True if the given MIME is JSON, false otherwise.
      */
     public boolean isJsonMime(String mime) {
       String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
-      return mime != null && (mime.matches(jsonMime) || mime.equalsIgnoreCase("application/json-patch+json"));
+      return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
     }
 
     /**
diff --git a/samples/client/petstore/java/resteasy/gradlew b/samples/client/petstore/java/resteasy/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/ApiClient.java
index 84212e9462..88478cfaa8 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/ApiClient.java
@@ -377,9 +377,13 @@ public class ApiClient {
    *   application/json
    *   application/json; charset=UTF8
    *   APPLICATION/JSON
+   *   application/vnd.company+json
+   * @param mime MIME (Multipurpose Internet Mail Extensions)
+   * @return True if the given MIME is JSON, false otherwise.
    */
   public boolean isJsonMime(String mime) {
-    return mime != null && mime.matches("(?i)application\\/json(;.*)?");
+    String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
   }
 
   /**
diff --git a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Order.java
index 2edfd83b31..adcd2b0d82 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/resttemplate-withXml/.swagger-codegen/VERSION b/samples/client/petstore/java/resttemplate-withXml/.swagger-codegen/VERSION
index 7fea99011a..f9f7450d13 100644
--- a/samples/client/petstore/java/resttemplate-withXml/.swagger-codegen/VERSION
+++ b/samples/client/petstore/java/resttemplate-withXml/.swagger-codegen/VERSION
@@ -1 +1 @@
-2.2.3-SNAPSHOT
\ No newline at end of file
+2.3.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/java/resttemplate/gradlew b/samples/client/petstore/java/resttemplate/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/ApiClient.java
index d8d84aedfb..dec5e46697 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/ApiClient.java
@@ -411,6 +411,11 @@ public class ApiClient {
     * @return boolean true if the MediaType represents JSON, false otherwise
     */
     public boolean isJsonMime(String mediaType) {
+        // "* / *" is default to JSON
+        if ("*/*".equals(mediaType)) {
+            return true;
+        }
+
         try {
             return isJsonMime(MediaType.parseMediaType(mediaType));
         } catch (InvalidMediaTypeException e) {
@@ -645,4 +650,4 @@ public class ApiClient {
             return builder.toString();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Cat.java
index 6113e3deb2..6713ec2c10 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Cat.java
@@ -39,7 +39,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Order.java
index 2edfd83b31..adcd2b0d82 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/io/swagger/client/model/Order.java
@@ -181,7 +181,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/retrofit/gradlew b/samples/client/petstore/java/retrofit/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Cat.java
index 87b2c00ea1..c792aabac2 100644
--- a/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Cat.java
@@ -42,7 +42,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Order.java
index 3249680760..b37783e576 100644
--- a/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/Order.java
@@ -196,7 +196,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/retrofit2-play24/gradlew b/samples/client/petstore/java/retrofit2-play24/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Cat.java
index d2d8ad0752..0694cba6dc 100644
--- a/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Cat.java
@@ -41,7 +41,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Order.java
index 275172b86f..164cd40870 100644
--- a/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit2-play24/src/main/java/io/swagger/client/model/Order.java
@@ -184,7 +184,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/retrofit2/gradlew b/samples/client/petstore/java/retrofit2/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Cat.java
index 87b2c00ea1..c792aabac2 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Cat.java
@@ -42,7 +42,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Order.java
index 7856f4baf7..cab388bc2a 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/model/Order.java
@@ -196,7 +196,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/retrofit2rx/gradlew b/samples/client/petstore/java/retrofit2rx/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Cat.java
index 87b2c00ea1..c792aabac2 100644
--- a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Cat.java
@@ -42,7 +42,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Order.java
index 7856f4baf7..cab388bc2a 100644
--- a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/model/Order.java
@@ -196,7 +196,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }
 
diff --git a/samples/client/petstore/java/retrofit2rx2/gradlew b/samples/client/petstore/java/retrofit2rx2/gradlew
old mode 100755
new mode 100644
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Cat.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Cat.java
index 87b2c00ea1..c792aabac2 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Cat.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Cat.java
@@ -42,7 +42,7 @@ public class Cat extends Animal {
    * @return declawed
   **/
   @ApiModelProperty(value = "")
-  public Boolean getDeclawed() {
+  public Boolean isDeclawed() {
     return declawed;
   }
 
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Order.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Order.java
index 7856f4baf7..cab388bc2a 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Order.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/io/swagger/client/model/Order.java
@@ -196,7 +196,7 @@ public class Order {
    * @return complete
   **/
   @ApiModelProperty(value = "")
-  public Boolean getComplete() {
+  public Boolean isComplete() {
     return complete;
   }