diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/NewCodeBuilder.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/NewCodeBuilder.kt
index 406d7bc2e86..34ee3870744 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/NewCodeBuilder.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/NewCodeBuilder.kt
@@ -204,16 +204,16 @@ class NewCodeBuilder {
             if (isInInterface) {
                 renderList(extendTypes) { renderType(it) }
             } else {
-                extendTypes.singleOrNull()?.also {
-                    renderType(it)
+                extendTypes.singleOrNull()?.also { superType ->
+                    renderType(superType)
+                    val primaryConstructor = parentClass.primaryConstructor()
                     val delegationCall =
-                        parentClass
-                            .primaryConstructor()
+                        primaryConstructor
                             ?.delegationCall
                             ?.let { it as? JKDelegationConstructorCall }
                     if (delegationCall != null) {
                         printer.par { delegationCall.arguments.accept(this) }
-                    } else {
+                    } else if (!superType.isInterface()) {
                         printer.printWithNoIndent("()")
                     }
                 }
@@ -608,7 +608,7 @@ class NewCodeBuilder {
             }
             printer.printWithNoIndent(javaNewExpression.classSymbol.displayName().escapedAsQualifiedName())
             javaNewExpression.typeArgumentList.accept(this)
-            if (javaNewExpression.constructorIsPresent() || !javaNewExpression.isAnonymousClass()) {
+            if (!javaNewExpression.classSymbol.isInterface()) {
                 printer.par(ROUND) {
                     javaNewExpression.arguments.accept(this)
                 }
@@ -709,6 +709,8 @@ class NewCodeBuilder {
             printer.printWithNoIndent(" constructor ")
             if (ktPrimaryConstructor.parameters.isNotEmpty()) {
                 renderParameterList(ktPrimaryConstructor.parameters)
+            } else {
+                printer.print("()")
             }
         }
 
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
index 5a67848bd5c..801f369af35 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
@@ -44,17 +44,6 @@ interface JKJavaNewExpression : JKExpression, JKTypeArgumentListOwner, PsiOwner
 fun JKJavaNewExpression.isAnonymousClass() =
     classBody !is JKEmptyClassBody
 
-fun JKJavaNewExpression.constructorIsPresent(): Boolean {
-    if (arguments.expressions.isNotEmpty()) return true
-    val symbol = classSymbol
-    return when (symbol) {
-        is JKMultiverseClassSymbol -> symbol.target.constructors.isNotEmpty()
-        is JKMultiverseKtClassSymbol -> symbol.target.constructor != null
-        is JKUniverseClassSymbol -> symbol.target.classBody.declarations.any { it is JKKtConstructor }
-        is JKUnresolvedClassSymbol -> true //TODO ???
-        else -> TODO(symbol::class.toString())
-    }
-}
 
 interface JKJavaDefaultNewExpression : JKExpression {
     val classSymbol: JKClassSymbol
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
index a6385b9f650..5b75e55f9b6 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
@@ -296,4 +296,17 @@ fun JKType.arrayInnerType(): JKType? =
 
 val namesOfPrimitiveTypes by lazy {
     KotlinBuiltIns.FQ_NAMES.primitiveTypeShortNames.map { it.identifier.decapitalize() }
-}
\ No newline at end of file
+}
+
+fun JKClassSymbol.isInterface(): Boolean {
+    val target = target
+    return when (target) {
+        is PsiClass -> target.isInterface
+        is KtClass -> target.isInterface()
+        is JKClass -> target.classKind == JKClass.ClassKind.INTERFACE
+        else -> false
+    }
+}
+
+fun JKType.isInterface(): Boolean =
+    (this as? JKClassType)?.classReference?.isInterface() ?: false
\ No newline at end of file