diff --git a/bin/java-petstore-feign.sh b/bin/java-petstore-feign.sh
index 40dbc592f7e..61c4621a1f6 100755
--- a/bin/java-petstore-feign.sh
+++ b/bin/java-petstore-feign.sh
@@ -26,6 +26,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-feign.json -o samples/client/petstore/java/feign -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-feign.json -o samples/client/petstore/java/feign -DhideGenerationTimestamp=true"
 
 java $JAVA_OPTS -jar $executable $ags
diff --git a/bin/java-petstore-jersey2.sh b/bin/java-petstore-jersey2.sh
index 335652f79bb..0850bdbb4f4 100755
--- a/bin/java-petstore-jersey2.sh
+++ b/bin/java-petstore-jersey2.sh
@@ -26,7 +26,7 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-jersey2.json -o samples/client/petstore/java/jersey2 -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-jersey2.json -o samples/client/petstore/java/jersey2 -DhideGenerationTimestamp=true"
 
 echo "Removing files and folders under samples/client/petstore/java/jersey2/src/main"
 rm -rf samples/client/petstore/java/jersey2/src/main
diff --git a/bin/java-petstore-okhttp-gson.sh b/bin/java-petstore-okhttp-gson.sh
index 521c8ca4826..492cd5ff4a4 100755
--- a/bin/java-petstore-okhttp-gson.sh
+++ b/bin/java-petstore-okhttp-gson.sh
@@ -26,7 +26,7 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-okhttp-gson.json -o samples/client/petstore/java/okhttp-gson -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-okhttp-gson.json -o samples/client/petstore/java/okhttp-gson -DhideGenerationTimestamp=true"
 
 rm -rf samples/client/petstore/java/okhttp-gson/src/main
 find samples/client/petstore/java/okhttp-gson -maxdepth 1 -type f ! -name "README.md" -exec rm {} +
diff --git a/bin/java-petstore-retrofit.sh b/bin/java-petstore-retrofit.sh
index 0866cdfa580..3b370fde7dd 100755
--- a/bin/java-petstore-retrofit.sh
+++ b/bin/java-petstore-retrofit.sh
@@ -26,7 +26,7 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit.json -o samples/client/petstore/java/retrofit  -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit.json -o samples/client/petstore/java/retrofit -DhideGenerationTimestamp=true"
 
 echo "Removing files and folders under samples/client/petstore/java/retrofit/src/main"
 rm -rf samples/client/petstore/java/retrofit/src/main
diff --git a/bin/java-petstore-retrofit2.sh b/bin/java-petstore-retrofit2.sh
index 14175ce72a2..8cf9468c3a1 100755
--- a/bin/java-petstore-retrofit2.sh
+++ b/bin/java-petstore-retrofit2.sh
@@ -26,6 +26,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit2.json -o samples/client/petstore/java/retrofit2 -DdateLibrary=joda"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit2.json -o samples/client/petstore/java/retrofit2 -DhideGenerationTimestamp=true"
 
 java $JAVA_OPTS -jar $executable $ags
diff --git a/bin/java-petstore-retrofit2rx.sh b/bin/java-petstore-retrofit2rx.sh
index c62da51daa8..af62352c03f 100755
--- a/bin/java-petstore-retrofit2rx.sh
+++ b/bin/java-petstore-retrofit2rx.sh
@@ -26,6 +26,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit2rx.json -o samples/client/petstore/java/retrofit2rx -DuseRxJava=true,dateLibrary=joda"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -c bin/java-petstore-retrofit2rx.json -o samples/client/petstore/java/retrofit2rx -DuseRxJava=true,hideGenerationTimestamp=true"
 
 java $JAVA_OPTS -jar $executable $ags
diff --git a/bin/java-petstore.sh b/bin/java-petstore.sh
index b2773945ea2..be6472d7aad 100755
--- a/bin/java-petstore.sh
+++ b/bin/java-petstore.sh
@@ -26,7 +26,7 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -o samples/client/petstore/java/default -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -i modules/swagger-codegen/src/test/resources/2_0/petstore-with-fake-endpoints-models-for-testing.yaml -l java -o samples/client/petstore/java/default -DhideGenerationTimestamp=true"
 
 echo "Removing files and folders under samples/client/petstore/java/default/src/main"
 rm -rf samples/client/petstore/java/default/src/main
diff --git a/bin/springboot-petstore-server.sh b/bin/springboot-petstore-server.sh
index 9e79d42cc86..7fe3ac60e53 100755
--- a/bin/springboot-petstore-server.sh
+++ b/bin/springboot-petstore-server.sh
@@ -26,7 +26,7 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="$@ generate -t modules/swagger-codegen/src/main/resources/JavaSpringBoot -i modules/swagger-codegen/src/test/resources/2_0/petstore.yaml -l springboot -o samples/server/petstore/springboot -DdateLibrary=joda,hideGenerationTimestamp=true"
+ags="$@ generate -t modules/swagger-codegen/src/main/resources/JavaSpringBoot -i modules/swagger-codegen/src/test/resources/2_0/petstore.yaml -l springboot -o samples/server/petstore/springboot -DhideGenerationTimestamp=true"
 
 echo "Removing files and folders under samples/server/petstore/springboot/src/main"
 rm -rf samples/server/petstore/springboot/src/main
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaJAXRSServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaJAXRSServerCodegen.java
index 27f435250a0..fbb2831ab8b 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaJAXRSServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractJavaJAXRSServerCodegen.java
@@ -26,6 +26,7 @@ public abstract class AbstractJavaJAXRSServerCodegen extends JavaClientCodegen {
     public AbstractJavaJAXRSServerCodegen()
     {
         super();
+        dateLibrary = "legacy";
         apiTestTemplateFiles.clear(); // TODO: add test template
     }
 
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/GroovyClientCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/GroovyClientCodegen.java
index 1ed9604fbf4..5b26662531f 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/GroovyClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/GroovyClientCodegen.java
@@ -27,6 +27,7 @@ public class GroovyClientCodegen extends JavaClientCodegen {
         configPackage = "io.swagger.configuration";
         invokerPackage = "io.swagger.api";
         artifactId = "swagger-spring-mvc-server";
+        dateLibrary = "legacy";
 
         additionalProperties.put(CodegenConstants.INVOKER_PACKAGE, invokerPackage);
         additionalProperties.put(CodegenConstants.GROUP_ID, groupId);
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java
index 16c9f9ae12b..c80bb0ed23f 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java
@@ -30,7 +30,7 @@ public class JavaClientCodegen extends DefaultCodegen implements CodegenConfig {
     public static final String RETROFIT_1 = "retrofit";
     public static final String RETROFIT_2 = "retrofit2";
 
-    protected String dateLibrary = "default";
+    protected String dateLibrary = "joda";
     protected String invokerPackage = "io.swagger.client";
     protected String groupId = "io.swagger";
     protected String artifactId = "swagger-java-client";
@@ -128,6 +128,7 @@ public class JavaClientCodegen extends DefaultCodegen implements CodegenConfig {
         Map<String, String> dateOptions = new HashMap<String, String>();
         dateOptions.put("java8", "Java 8 native");
         dateOptions.put("joda", "Joda");
+        dateOptions.put("legacy", "Legacy java.util.Date");
         dateLibrary.setEnum(dateOptions);
 
         cliOptions.add(dateLibrary);
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
index bb32ee9ab8d..8a08bf758a3 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
@@ -29,6 +29,7 @@ public class JavaInflectorServerCodegen extends JavaClientCodegen {
         embeddedTemplateDir = templateDir = "JavaInflector";
         invokerPackage = "io.swagger.handler";
         artifactId = "swagger-inflector-server";
+        dateLibrary = "legacy";
 
         apiPackage = System.getProperty("swagger.codegen.inflector.apipackage", "io.swagger.handler");
         modelPackage = System.getProperty("swagger.codegen.inflector.modelpackage", "io.swagger.model");
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyServerCodegen.java
index 5717c902740..4c13fd50f0b 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyServerCodegen.java
@@ -34,6 +34,7 @@ public class JavaResteasyServerCodegen extends JavaClientCodegen implements Code
         apiTestTemplateFiles.clear(); // TODO: add test template
         apiPackage = "io.swagger.api";
         modelPackage = "io.swagger.model";
+        dateLibrary = "legacy";
 
         additionalProperties.put("title", title);
 
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/SpringMVCServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/SpringMVCServerCodegen.java
index 18b2f872d56..47c67a4ec6d 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/SpringMVCServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/SpringMVCServerCodegen.java
@@ -25,6 +25,7 @@ public class SpringMVCServerCodegen extends JavaClientCodegen implements Codegen
         configPackage = "io.swagger.configuration";
         invokerPackage = "io.swagger.api";
         artifactId = "swagger-spring-mvc-server";
+        dateLibrary = "legacy";
 
         additionalProperties.put(CodegenConstants.INVOKER_PACKAGE, invokerPackage);
         additionalProperties.put(CodegenConstants.GROUP_ID, groupId);
diff --git a/samples/client/petstore/java/okhttp-gson/hello.txt b/samples/client/petstore/java/okhttp-gson/hello.txt
deleted file mode 100644
index 6769dd60bdf..00000000000
--- a/samples/client/petstore/java/okhttp-gson/hello.txt
+++ /dev/null
@@ -1 +0,0 @@
-Hello world!
\ No newline at end of file
diff --git a/samples/client/petstore/java/retrofit/hello.txt b/samples/client/petstore/java/retrofit/hello.txt
deleted file mode 100644
index 6769dd60bdf..00000000000
--- a/samples/client/petstore/java/retrofit/hello.txt
+++ /dev/null
@@ -1 +0,0 @@
-Hello world!
\ No newline at end of file
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
index 344f523df41..03c6c81e434 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/StringUtil.java
@@ -1,6 +1,31 @@
+/**
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\ 
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
 package io.swagger.client;
 
-@javax.annotation.Generated(value = "class io.swagger.codegen.languages.JavaClientCodegen", date = "2016-06-08T18:45:27.896+02:00")
+
 public class StringUtil {
   /**
    * Check if the given array contains the given value (with case-insensitive comparison).
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/auth/OAuthFlow.java b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/auth/OAuthFlow.java
index 597ec99b48b..ec1f942b0f2 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/auth/OAuthFlow.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/auth/OAuthFlow.java
@@ -1,5 +1,30 @@
+/**
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\ 
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
 package io.swagger.client.auth;
 
 public enum OAuthFlow {
     accessCode, implicit, password, application
-}
\ No newline at end of file
+}
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/StringUtil.java b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/StringUtil.java
index 391c1c016c6..03c6c81e434 100644
--- a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/StringUtil.java
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/StringUtil.java
@@ -1,6 +1,31 @@
+/**
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\ 
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
 package io.swagger.client;
 
-@javax.annotation.Generated(value = "class io.swagger.codegen.languages.JavaClientCodegen", date = "2016-06-08T18:44:17.529+02:00")
+
 public class StringUtil {
   /**
    * Check if the given array contains the given value (with case-insensitive comparison).
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/auth/OAuthFlow.java b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/auth/OAuthFlow.java
index 597ec99b48b..ec1f942b0f2 100644
--- a/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/auth/OAuthFlow.java
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/auth/OAuthFlow.java
@@ -1,5 +1,30 @@
+/**
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\ 
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
 package io.swagger.client.auth;
 
 public enum OAuthFlow {
     accessCode, implicit, password, application
-}
\ No newline at end of file
+}