Java class type mismatch in scala?

Question

I am trying to import the Color class from javafx, and use it in a scala class. But when I use my class somewhere else, I get this error:

Error:(9, 50) type mismatch;
 found   : javafx.scene.paint.Color
 required: drawingengine.Color

Here is the code:

package drawingengine
import javafx.scene.paint.Color
sealed class Pixel(x: Int, y: Int, color: Color);

I can fix it myself by changing line 3 to:

sealed class Pixel(x: Int, y: Int, color: javafx.scene.paint.Color);

But I think this is kinda ugly, so is't there a better way to use an imported class?

Also, i get this warning

imported `Color' is permanently hidden by definition of object Color in package drawingengine
import javafx.scene.paint.Color

and IntelliJ greys out the importing line as if it is not used.

I can see that others have had the same problem, but I don't see how the shown example applies to what i am doing. So what can I do about this warning?

I think your IDE is not able to import javafx.scene.paint.Color. can you try it on a notepad — Saurabh Jhunjhunwala, Mar 22 '19 at 09:19
Isn't warning explains it all? You have `drawingengine.Color` in your project. Rename it (or remove). — talex, Mar 22 '19 at 09:21

score 2 · Accepted Answer · answered Mar 22 '19 at 09:23

This means you have defined your own Color class, inside the same package drawingengine, and that it is colliding with the JavaFX one.
This

javafx.scene.paint.Color

fixes it because you explicitly use a qualified name.
If you want to maintain both of them, you might alias the JavaFX one

import javafx.scene.paint.{Color => FxColor}

And use it like

sealed class Pixel(x: Int, y: Int, color: FxColor);

Java class type mismatch in scala?

1 Answers1