Alert in scalaFX not work

[Rimeh BN]

My code is :

import scala.collection.mutable.Stack

import scalafx.Includes._
import scalafx.collections.ObservableBuffer
import scalafx.scene.Scene
import scalafx.scene.control.{Label, ListView, TextField}
import scalafx.scene.layout.Pane
import scalafx.stage.Stage

class TableToChooseView extends Pane {

  val textView = new TextField(){
    promptText = "choose table for starting"
    layoutX = 100
    layoutY = 50
    prefHeight = 30
    prefWidth = 250
  }

  val  list : List[String] = TablesDefinitionMapping.listOfAllTablesName
  val characters = ObservableBuffer[String](list)

  val listview = new ListView[String]{
    items = characters
    prefHeight =300
    prefWidth = 250
    layoutX = 100
    layoutY = 100
  }

  children.addAll(listview, textView)

  textView.onKeyReleased = handle {

    characters.clear()
    val s = list.filter( x => x.toLowerCase.contains(textView.getText.toLowerCase))

    if (s .size == 0){
      new Alert(AlertType.Information) {
        title = "Information Dialog"
        headerText = "Look, an Information Dialog"
        contentText = "I have a great message for you!"
      }.showAndWait()

    }else {

   for (i <- 0 until s.size){

      characters.add(s(i))
    }
    }
    }
    listview.items = characters


  listview.onMousePressed = handle {

    SchemaNavigationView.listCurrentTables= List()
    SchemaNavigationView.sizesChildren = Stack()
    SchemaNavigationView.sizesParent = Stack()
    SchemaNavigationView.listCurrentLine = List()
    SchemaNavigationView.indexOfCurrentNewLine = 0
    SchemaNavigationView.coordinatesOfParentTable = List()
    SchemaNavigationView.indexOfChildrenTable = 0
    SchemaNavigationView.indexOfParentTable = 0

    new Stage {
      title = "DB walker "
      width = 1200
      height = 600
      scene = new Scene {
        content = (new FirstNavigationPane(listview.getSelectionModel.getSelectedItem.toString))
      }
    }.show()

  }


}

the result is:
Error:(11, 8) object Alert is not a member of package scalafx.scene.control
import scalafx.scene.control.{Label, ListView, TextField, Alert}
       ^

Error:(48, 11) not found: type Alert
      new Alert(AlertType.Information) {
          ^
Error:(48, 11) too many arguments for constructor Object: ()Object
      new Alert(AlertType.Information) {
          ^
Error:(51, 9) not found: value contentText
        contentText = "I have a great message for you!"
        ^
Error:(52, 9) value showAndWait is not a member of AnyRef
possible cause: maybe a semicolon is missing before `value showAndWait'?
      }.showAndWait()
        ^

[Jarek Sacha]

You are missing imports for Alert:

import scalafx.scene.control.Alert.AlertType
import scalafx.scene.control.Alert

You also need to use ScalaFX v8.0.40-R8 or newer and Java 8.0_u40 or newer.

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