diff --git a/src/Luban.Job.Cfg/Source/TypeVisitors/JavaJsonDeserialize.cs b/src/Luban.Job.Cfg/Source/TypeVisitors/JavaJsonDeserialize.cs
index 2a8feee..ec362ab 100644
--- a/src/Luban.Job.Cfg/Source/TypeVisitors/JavaJsonDeserialize.cs
+++ b/src/Luban.Job.Cfg/Source/TypeVisitors/JavaJsonDeserialize.cs
@@ -93,37 +93,37 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TArray type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonArray(); int _n = _json0_.size(); {x} = new {type.ElementType.Apply(JavaDefineTypeName.Ins)}[_n]; int _index=0; for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}[_index++] = __v; }}   }}";
+            return $"{{ com.google.gson.JsonArray _json0_ = {json}.getAsJsonArray(); int _n = _json0_.size(); {x} = new {type.ElementType.Apply(JavaDefineTypeName.Ins)}[_n]; int _index=0; for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}[_index++] = __v; }}   }}";
         }
 
         public string Accept(TList type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}.add(__v); }}   }}";
+            return $"{{ com.google.gson.JsonArray _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}.add(__v); }}   }}";
         }
 
         public string Accept(TSet type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}.add(__v); }}   }}";
+            return $"{{ com.google.gson.JsonArray _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ElementType.Apply(this, "__e", "__v")}  {x}.add(__v); }}   }}";
         }
 
         public string Accept(TMap type, string json, string x)
         {
-            return @$"{{ var _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.KeyType.Apply(JavaDefineTypeName.Ins)} __k;  {type.KeyType.Apply(this, "__e.getAsJsonArray().get(0)", "__k")} {type.ValueType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ValueType.Apply(this, "__e.getAsJsonArray().get(1)", "__v")}  {x}.put(__k, __v); }}   }}";
+            return @$"{{ com.google.gson.JsonArray _json0_ = {json}.getAsJsonArray(); {x} = new {type.Apply(JavaDefineTypeName.Ins)}(_json0_.size()); for(JsonElement __e : _json0_) {{ {type.KeyType.Apply(JavaDefineTypeName.Ins)} __k;  {type.KeyType.Apply(this, "__e.getAsJsonArray().get(0)", "__k")} {type.ValueType.Apply(JavaDefineTypeName.Ins)} __v;  {type.ValueType.Apply(this, "__e.getAsJsonArray().get(1)", "__v")}  {x}.put(__k, __v); }}   }}";
         }
 
         public string Accept(TVector2 type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y); }}";
+            return $"{{ com.google.gson.JsonObject _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y); }}";
         }
 
         public string Accept(TVector3 type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } float __z; {TFloat.Ins.Apply(this, "_json0_.get(\"z\")", "__z") }  {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y,__z); }}";
+            return $"{{ com.google.gson.JsonObject _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } float __z; {TFloat.Ins.Apply(this, "_json0_.get(\"z\")", "__z") }  {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y,__z); }}";
         }
 
         public string Accept(TVector4 type, string json, string x)
         {
-            return $"{{ var _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } float __z; {TFloat.Ins.Apply(this, "_json0_.get(\"z\")", "__z") }  float __w; {TFloat.Ins.Apply(this, "_json0_.get(\"w\")", "__w") } {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y, __z, __w); }}";
+            return $"{{ com.google.gson.JsonObject _json0_ = {json}.getAsJsonObject(); float __x; {TFloat.Ins.Apply(this, "_json0_.get(\"x\")", "__x") } float __y; {TFloat.Ins.Apply(this, "_json0_.get(\"y\")", "__y") } float __z; {TFloat.Ins.Apply(this, "_json0_.get(\"z\")", "__z") }  float __w; {TFloat.Ins.Apply(this, "_json0_.get(\"w\")", "__w") } {x} = new {type.Apply(JavaDefineTypeName.Ins)}(__x, __y, __z, __w); }}";
         }
 
         public string Accept(TDateTime type, string json, string x)
diff --git a/src/Luban.Job.Cfg/Source/TypeVisitors/JavaUnderingDeserializeVisitor.cs b/src/Luban.Job.Cfg/Source/TypeVisitors/JavaUnderingDeserializeVisitor.cs
index 8b5ffb3..bfea921 100644
--- a/src/Luban.Job.Cfg/Source/TypeVisitors/JavaUnderingDeserializeVisitor.cs
+++ b/src/Luban.Job.Cfg/Source/TypeVisitors/JavaUnderingDeserializeVisitor.cs
@@ -91,22 +91,22 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TArray type, string bufName, string fieldName)
         {
-            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.ElementType.Apply(JavaDefineTypeName.Ins)}[n];for(var i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} _e;{type.ElementType.Apply(this, bufName, "_e")} {fieldName}[i] = _e;}}}}";
+            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.ElementType.Apply(JavaDefineTypeName.Ins)}[n];for(int i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaDefineTypeName.Ins)} _e;{type.ElementType.Apply(this, bufName, "_e")} {fieldName}[i] = _e;}}}}";
         }
 
         public string Accept(TList type, string bufName, string fieldName)
         {
-            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n);for(var i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaBoxDefineTypeName.Ins)} _e;  {type.ElementType.Apply(this, bufName, "_e")} {fieldName}.add(_e);}}}}";
+            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n);for(int i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaBoxDefineTypeName.Ins)} _e;  {type.ElementType.Apply(this, bufName, "_e")} {fieldName}.add(_e);}}}}";
         }
 
         public string Accept(TSet type, string bufName, string fieldName)
         {
-            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n * 3 / 2);for(var i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaBoxDefineTypeName.Ins)} _e;  {type.ElementType.Apply(this, bufName, "_e")} {fieldName}.add(_e);}}}}";
+            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n * 3 / 2);for(int i = 0 ; i < n ; i++) {{ {type.ElementType.Apply(JavaBoxDefineTypeName.Ins)} _e;  {type.ElementType.Apply(this, bufName, "_e")} {fieldName}.add(_e);}}}}";
         }
 
         public string Accept(TMap type, string bufName, string fieldName)
         {
-            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n * 3 / 2);for(var i = 0 ; i < n ; i++) {{ {type.KeyType.Apply(JavaBoxDefineTypeName.Ins)} _k;  {type.KeyType.Apply(this, bufName, "_k")} {type.ValueType.Apply(JavaBoxDefineTypeName.Ins)} _v;  {type.ValueType.Apply(this, bufName, "_v")}     {fieldName}.put(_k, _v);}}}}";
+            return $"{{int n = Math.min({bufName}.readSize(), {bufName}.size());{fieldName} = new {type.Apply(JavaDefineTypeName.Ins)}(n * 3 / 2);for(int i = 0 ; i < n ; i++) {{ {type.KeyType.Apply(JavaBoxDefineTypeName.Ins)} _k;  {type.KeyType.Apply(this, bufName, "_k")} {type.ValueType.Apply(JavaBoxDefineTypeName.Ins)} _v;  {type.ValueType.Apply(this, bufName, "_v")}     {fieldName}.put(_k, _v);}}}}";
 
         }
 
diff --git a/src/Luban.Server/Templates/config/java_bin/tables.tpl b/src/Luban.Server/Templates/config/java_bin/tables.tpl
index 5a13612..cb7d996 100644
--- a/src/Luban.Server/Templates/config/java_bin/tables.tpl
+++ b/src/Luban.Server/Templates/config/java_bin/tables.tpl
@@ -19,7 +19,7 @@ public final class {{name}}
     {{~end~}}
 
     public {{name}}(IByteBufLoader loader) throws java.io.IOException {
-        var tables = new java.util.HashMap<String, Object>();
+        java.util.HashMap<String, Object> tables = new java.util.HashMap<>();
         {{~for table in tables ~}}
         {{table.inner_name}} = new {{table.full_name_with_top_module}}(loader.load("{{table.output_data_file}}")); 
         tables.put("{{table.full_name}}", {{table.inner_name}});
diff --git a/src/Luban.Server/Templates/config/java_json/table.tpl b/src/Luban.Server/Templates/config/java_json/table.tpl
index 2b02415..9c45d2d 100644
--- a/src/Luban.Server/Templates/config/java_json/table.tpl
+++ b/src/Luban.Server/Templates/config/java_json/table.tpl
@@ -24,7 +24,7 @@ public final class {{name}} {
         _dataMap = new java.util.HashMap<{{java_box_define_type key_type}}, {{java_box_define_type value_type}}>();
         _dataList = new java.util.ArrayList<{{java_box_define_type value_type}}>();
         
-        for(var _e_ : __json__.getAsJsonArray()) {
+        for(com.google.gson.JsonElement _e_ : __json__.getAsJsonArray()) {
             {{java_box_define_type value_type}} _v;
             {{java_deserialize '_e_.getAsJsonObject()' '_v' value_type}}
             _dataList.add(_v);
diff --git a/src/Luban.Server/Templates/config/java_json/tables.tpl b/src/Luban.Server/Templates/config/java_json/tables.tpl
index abe7c71..d73045c 100644
--- a/src/Luban.Server/Templates/config/java_json/tables.tpl
+++ b/src/Luban.Server/Templates/config/java_json/tables.tpl
@@ -19,7 +19,7 @@ public final class {{name}}
     {{~end~}}
 
     public {{name}}(IJsonLoader loader) throws java.io.IOException {
-        var tables = new java.util.HashMap<String, Object>();
+        java.util.HashMap<String, Object> tables = new java.util.HashMap<>();
         {{~for table in tables ~}}
         {{table.inner_name}} = new {{table.full_name_with_top_module}}(loader.load("{{table.output_data_file}}")); 
         tables.put("{{table.full_name}}", {{table.inner_name}});