KT-35897: change type for enum constructor for visibility

nj2k/src/org/jetbrains/kotlin/nj2k/conversions/InternalDeclarationConversion.kt

@@ -26,7 +26,7 @@ class InternalDeclarationConversion(context: NewJ2kConverterContext) : Recursive
         element.visibility = when {
             containingClassKind == JKClass.ClassKind.INTERFACE || containingClassKind == JKClass.ClassKind.ANNOTATION ->
                 Visibility.PUBLIC
-            containingClassKind == JKClass.ClassKind.ENUM && element is JKKtPrimaryConstructor ->
+            containingClassKind == JKClass.ClassKind.ENUM && element is JKConstructor ->
                 Visibility.PRIVATE
             element is JKClass && !element.isLocalClass() ->
                 Visibility.INTERNAL

nj2k/testData/newJ2k/enum/implicitlyPrivateConstructorsEnum.java

@@ -0,0 +1,13 @@
+public enum JavaEnum {
+    A("a"), B;
+
+    JavaEnum(String x) {
+        this.x = x;
+    }
+
+    JavaEnum() {
+        this.x = "default";
+    }
+
+    protected String x;
+}

nj2k/testData/newJ2k/enum/implicitlyPrivateConstructorsEnum.kt

@@ -0,0 +1,13 @@
+enum class JavaEnum {
+    A("a"), B;
+
+    constructor(x: String) {
+        this.x = x
+    }
+
+    constructor() {
+        x = "default"
+    }
+
+    protected var x: String
+}

nj2k/tests/org/jetbrains/kotlin/nj2k/NewJavaToKotlinConverterSingleFileTestGenerated.java

@@ -1864,6 +1864,11 @@ public class NewJavaToKotlinConverterSingleFileTestGenerated extends AbstractNew
             runTest("nj2k/testData/newJ2k/enum/fieldsWithPrimaryPrivateConstructor.java");
         }
 
+        @TestMetadata("implicitlyPrivateConstructorsEnum.java")
+        public void testImplicitlyPrivateConstructorsEnum() throws Exception {
+            runTest("nj2k/testData/newJ2k/enum/implicitlyPrivateConstructorsEnum.java");
+        }
+
         @TestMetadata("internalEnum.java")
         public void testInternalEnum() throws Exception {
             runTest("nj2k/testData/newJ2k/enum/internalEnum.java");