The Type of is erroneous error in netbeans

Question

I have defined two classes for a java program I am writing, call them Class1 and Class2. In the body of the constructor for Class1, I call the constructor for class 2. Howev

Answer 1

Make sure that you have entered correct package names in your classes.

Answer 2

This is an addition to the answer of Grease. (I can't add a comment due to lack of reputation.)

I sometimes run into the same issue and always deleted the complete folder, so NetBeans had to rebuild the maven-stuff which can take a few minutes.

If someone uses maven and don't want NetBeans has to completely rebuild the maven repos and -index, don't delete the following folders in the NetBeans cache folder:

• index
• mavencachedirs
• mavenindex

Just tested it with NetBeans 11.3: Not deleting the three folders makes the error(s) go away but don't bothers maven. I could imagine that this is the same with older versions of NetBeans.

Answer 3

I had the same issue and the solution was very simple in my case.

The case:
I copy/paste some classes from another project in a package of the project I am working in.
Some of them had the old package declaration and the compiler didn't complained (for his reasons).
When I used a method with return type one of the 'wrong packaged' classes this error appeared.
(The Type of is erroneous)

The solution
To solve the issue, I changed the package declaration to be the correct one!