diff --git a/modules/java/gen_java.py b/modules/java/gen_java.py
index bec1a9933..91e31cf5d 100644
--- a/modules/java/gen_java.py
+++ b/modules/java/gen_java.py
@@ -484,195 +484,6 @@ JNIEXPORT jdoubleArray JNICALL Java_org_opencv_core_Core_n_1getTextSize
         "waitKey"           : {'j_code' : '', 'jn_code' : '', 'cpp_code' : '' },
     }, # Highgui
 
-    'CvANN_MLP_TrainParams':
-    {
-        "CvANN_MLP_TrainParams" :
-        {
-            'j_code' : """
-//javadoc:CvANN_MLP_TrainParams::CvANN_MLP_TrainParams()
-public CvANN_MLP_TrainParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvANN_1MLP_1TrainParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvANN_MLP_TrainParams();
-}
-            """
-        },
-    },
-
-    'CvBoostParams':
-    {
-        "CvBoostParams" :
-        {
-            'j_code' : """
-//javadoc:CvBoostParams::CvBoostParams()
-public CvBoostParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvBoostParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvBoostParams();
-}
-            """
-        },
-    },
-
-    'CvDTreeParams':
-    {
-        "CvDTreeParams" :
-        {
-            'j_code' : """
-//javadoc:CvDTreeParams::CvDTreeParams()
-public CvDTreeParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvDTreeParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvDTreeParams();
-}
-            """
-        },
-    },
-
-    'CvEMParams':
-    {
-        "CvEMParams" :
-        {
-            'j_code' : """
-//javadoc:CvEMParams::CvEMParams()
-public CvEMParams() {
-    nativeObj = n_newObj();
-
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvEMParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvEMParams();
-}
-            """
-        },
-    },
-
-    'CvGBTreesParams':
-    {
-        "CvGBTreesParams" :
-        {
-            'j_code' : """
-//javadoc:CvGBTreesParams::CvGBTreesParams()
-public CvGBTreesParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvGBTreesParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvGBTreesParams();
-}
-            """
-        },
-    },
-
-    'CvParamGrid':
-    {
-        "CvParamGrid" :
-        {
-            'j_code' : """
-//javadoc:CvParamGrid::CvParamGrid()
-public CvParamGrid() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvParamGrid_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvParamGrid();
-}
-            """
-        },
-    },
-
-    'CvRTParams':
-    {
-        "CvRTParams" :
-        {
-            'j_code' : """
-//javadoc:CvRTParams::CvRTParams()
-public CvRTParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvRTParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvRTParams();
-}
-            """
-        },
-    },
-
-    'CvStatModel':
-    {
-        "CvStatModel" :
-        {
-            'j_code' : """
-//javadoc:CvStatModel::CvStatModel()
-public CvStatModel() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvStatModel_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvStatModel();
-}
-            """
-        },
-    },
-
-    'CvSVMParams':
-    {
-        "CvSVMParams" :
-        {
-            'j_code' : """
-//javadoc:CvSVMParams::CvSVMParams()
-public CvSVMParams() {
-    nativeObj = n_newObj();
-}
-            """,
-            'jn_code' : 'private static native long n_newObj();',
-            'cpp_code' : """
-JNIEXPORT jlong JNICALL Java_org_opencv_ml_CvSVMParams_n_1newObj
-  (JNIEnv* env, jclass cls)
-{
-    return (jlong) new CvSVMParams();
-}
-            """
-        },
-    },
 }
 
 # { class : { func : {arg_name : ctype} } }
@@ -872,6 +683,9 @@ public class %(jc)s {
             self.classes_simple.append(name)
         if '/Map' in decl[2]:
             self.classes_map.append(name)
+            #adding default c-tor
+            ffi = FuncFamilyInfo(['cv.'+name+'.'+name, '', [], []])
+            classinfo.methods[ffi.jname] = ffi
         type_dict[name] = \
             { "j_type" : classinfo.jname,
               "jn_type" : "long", "jn_args" : (("__int64", ".nativeObj"),),