create field from parameter: array types (IDEA-58140)

java/java-impl/src/com/intellij/codeInsight/intention/impl/CreateFieldFromParameterAction.java

@@ -56,6 +56,7 @@ public class CreateFieldFromParameterAction implements IntentionAction {
     if (parameter == null) return null;
     PsiType type = parameter.getType();
     if (type instanceof PsiEllipsisType) type = ((PsiEllipsisType)type).toArrayType();
+    if (type instanceof PsiArrayType) return new PsiType[]{type};
     final PsiClassType.ClassResolveResult result = PsiUtil.resolveGenericsClassInType(type);
     final PsiClass psiClass = result.getElement();
     if (psiClass == null) return new PsiType[] {type};

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createFieldFromParameter/afterArrayType.java

@@ -0,0 +1,10 @@
+// "Create Field For Parameter 'p1'" "true"
+
+class Test{
+    private final String[] myP1;
+
+    void f(String[] p1){
+        myP1 = p1;
+    }
+}
+

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createFieldFromParameter/beforeArrayType.java

@@ -0,0 +1,7 @@
+// "Create Field For Parameter 'p1'" "true"
+
+class Test{
+    void f(String[] p<caret>1){
+    }
+}
+