diff --git a/modules/swagger-codegen/src/main/resources/JavaPlayFramework/paramDefaultValue.mustache b/modules/swagger-codegen/src/main/resources/JavaPlayFramework/paramDefaultValue.mustache
index 733d31a6d72..a5587249639 100644
--- a/modules/swagger-codegen/src/main/resources/JavaPlayFramework/paramDefaultValue.mustache
+++ b/modules/swagger-codegen/src/main/resources/JavaPlayFramework/paramDefaultValue.mustache
@@ -1 +1 @@
-{{#isBoolean}}false{{/isBoolean}}{{#isInteger}}0{{/isInteger}}{{#isDouble}}0.0{{/isDouble}}{{#isLong}}0L{{/isLong}}{{#isFloat}}0.0{{/isFloat}}{{#isString}}""{{/isString}}
\ No newline at end of file
+{{#defaultValue}}{{#isString}}"{{/isString}}{{{defaultValue}}}{{#isString}}"{{/isString}}{{/defaultValue}}{{^defaultValue}}null{{/defaultValue}}
\ No newline at end of file
diff --git a/samples/server/petstore/java-play-framework/app/controllers/PetApiController.java b/samples/server/petstore/java-play-framework/app/controllers/PetApiController.java
index 4ee0a235890..c36fe77e3dd 100644
--- a/samples/server/petstore/java-play-framework/app/controllers/PetApiController.java
+++ b/samples/server/petstore/java-play-framework/app/controllers/PetApiController.java
@@ -53,7 +53,7 @@ public class PetApiController extends Controller {
             apiKey = (String)valueapiKey;
         
         } else {
-            apiKey = "";
+            apiKey = null;
         }
         imp.deletePet(petId, apiKey);
         
@@ -116,7 +116,7 @@ public class PetApiController extends Controller {
             name = (String)valuename;
         
         } else {
-            name = "";
+            name = null;
         }
         String valuestatus = (request().body().asMultipartFormData().asFormUrlEncoded().get("status"))[0];
         String status;
@@ -124,7 +124,7 @@ public class PetApiController extends Controller {
             status = (String)valuestatus;
         
         } else {
-            status = "";
+            status = null;
         }
         imp.updatePetWithForm(petId, name, status);
         
@@ -139,7 +139,7 @@ public class PetApiController extends Controller {
             additionalMetadata = (String)valueadditionalMetadata;
         
         } else {
-            additionalMetadata = "";
+            additionalMetadata = null;
         }
         Http.MultipartFormData.FilePart file = request().body().asMultipartFormData().getFile("file");
                 ModelApiResponse obj = imp.uploadFile(petId, additionalMetadata, file);