diff -r c3997b2f9d2e java.source/apichanges.xml
--- a/java.source/apichanges.xml	Wed May 15 17:16:06 2013 +0200
+++ b/java.source/apichanges.xml	Thu May 16 13:37:47 2013 +0200
@@ -108,6 +108,18 @@
     <!-- ACTUAL CHANGES BEGIN HERE: -->
 
     <changes>
+        <change id="GeneratorUtilities-createDefaultConstructor">
+            <api name="general"/>
+            <summary>Adding <code>GeneratorUtilities.createDefaultConstructor</code> method.</summary>
+            <version major="0" minor="126"/>
+            <date day="16" month="5" year="2013"/>
+            <author login="dbalek"/>
+            <compatibility addition="yes" binary="compatible" deletion="no" deprecation="no" modification="no" semantic="compatible" source="compatible"/>
+            <description>
+                A utility method createDefaulConstructor has been added to org.netbeans.api.java.source.GeneratorUtilities class.
+            </description>
+            <issue number="229233" />
+        </change>
         <change id="DocTreesSupport">
              <api name="general"/>
              <summary>Added support for DocTrees.</summary>
diff -r c3997b2f9d2e java.source/nbproject/project.properties
--- a/java.source/nbproject/project.properties	Wed May 15 17:16:06 2013 +0200
+++ b/java.source/nbproject/project.properties	Thu May 16 13:37:47 2013 +0200
@@ -46,7 +46,7 @@
 javadoc.title=Java Source
 javadoc.arch=${basedir}/arch.xml
 javadoc.apichanges=${basedir}/apichanges.xml
-spec.version.base=0.125.0
+spec.version.base=0.126.0
 test.qa-functional.cp.extra=${refactoring.java.dir}/modules/ext/nb-javac-api.jar
 test.unit.run.cp.extra=${o.n.core.dir}/core/core.jar:\
     ${o.n.core.dir}/lib/boot.jar:\
diff -r c3997b2f9d2e java.source/src/org/netbeans/api/java/source/GeneratorUtilities.java
--- a/java.source/src/org/netbeans/api/java/source/GeneratorUtilities.java	Wed May 15 17:16:06 2013 +0200
+++ b/java.source/src/org/netbeans/api/java/source/GeneratorUtilities.java	Thu May 16 13:37:47 2013 +0200
@@ -431,6 +431,24 @@
      * @since 0.20
      */
     public MethodTree createConstructor(TypeElement clazz, Iterable<? extends VariableElement> fields, ExecutableElement constructor) {
+        return createConstructor(clazz, fields, constructor, false);
+    }
+    
+    /**
+     * Creates a class default constructor. Fields and the inherited constructor
+     * are initialized/called with default values.
+     *
+     * @param clazz the class to create the constructor for
+     * @param fields fields to be initialized by the constructor
+     * @param constructor inherited constructor to be called
+     * @return the constructor
+     * @since 0.126
+     */
+    public MethodTree createDefaultConstructor(TypeElement clazz, Iterable<? extends VariableElement> fields, ExecutableElement constructor) {
+        return createConstructor(clazz, fields, constructor, true);
+    }
+
+    private MethodTree createConstructor(TypeElement clazz, Iterable<? extends VariableElement> fields, ExecutableElement constructor, boolean isDefault) {
         assert clazz != null && fields != null;
         TreeMaker make = copy.getTreeMaker();
         Set<Modifier> mods = EnumSet.of(clazz.getKind() == ElementKind.ENUM ? Modifier.PRIVATE : Modifier.PUBLIC);
@@ -441,8 +459,12 @@
         List<TypeParameterTree> typeParams = new LinkedList<TypeParameterTree>();
         for (VariableElement ve : fields) {
             TypeMirror type = copy.getTypes().asMemberOf((DeclaredType)clazz.asType(), ve);
-            parameters.add(make.Variable(parameterModifiers, ve.getSimpleName(), make.Type(type), null));
-            statements.add(make.ExpressionStatement(make.Assignment(make.MemberSelect(make.Identifier("this"), ve.getSimpleName()), make.Identifier(ve.getSimpleName())))); //NOI18N
+            if (isDefault) {
+                statements.add(make.ExpressionStatement(make.Assignment(make.MemberSelect(make.Identifier("this"), ve.getSimpleName()), make.Literal(defaultValue(type))))); //NOI18N
+            } else {
+                parameters.add(make.Variable(parameterModifiers, ve.getSimpleName(), make.Type(type), null));
+                statements.add(make.ExpressionStatement(make.Assignment(make.MemberSelect(make.Identifier("this"), ve.getSimpleName()), make.Identifier(ve.getSimpleName())))); //NOI18N
+            }
         }
         if (constructor != null) {
             ExecutableType constructorType = clazz.getSuperclass().getKind() == TypeKind.DECLARED ? (ExecutableType) copy.getTypes().asMemberOf((DeclaredType) clazz.getSuperclass(), constructor) : null;
@@ -454,9 +476,12 @@
                     VariableElement ve = parameterElements.next();
                     Name simpleName = ve.getSimpleName();
                     TypeMirror type = parameterTypes != null ? parameterTypes.next() : ve.asType();
-
-                    parameters.add(make.Variable(parameterModifiers, simpleName, make.Type(type), null));
-                    arguments.add(make.Identifier(simpleName));
+                    if (isDefault) {
+                        arguments.add(make.Literal(defaultValue(type)));
+                    } else {
+                        parameters.add(make.Variable(parameterModifiers, simpleName, make.Type(type), null));
+                        arguments.add(make.Identifier(simpleName));
+                    }
                 }
                 statements.addFirst(make.ExpressionStatement(make.MethodInvocation(Collections.<ExpressionTree>emptyList(), make.Identifier("super"), arguments))); //NOI18N
             }
@@ -1177,6 +1202,22 @@
         return method;
     }
 
+    private static Object defaultValue(TypeMirror type) {
+        switch(type.getKind()) {
+            case BOOLEAN:
+                return false;
+            case BYTE:
+            case CHAR:
+            case DOUBLE:
+            case FLOAT:
+            case INT:
+            case LONG:
+            case SHORT:
+                return 0;
+        }
+        return null;
+    }
+
     private static boolean supportsOverride(CompilationInfo info) {
         return info.getElements().getTypeElement("java.lang.Override") != null;
     }