CODEWITHSUNDEEP
javafx
Pavel_Kisliuk
Pavel_Kisliuk

Reputation: 15

ComboBox and ChoiceBox don`t show content

ComboBox and CheckBox set element's inside it https://ibb.co/7YWQfLh, but don't display this element's https://ibb.co/Mfy2mZb

I create boxes in different panes (HBox, VBox, AnchorPane, GridPane), result the same. I used Enum and usual String and result the same.

public class TestFXController {

    @FXML
    private ComboBox<String> asd;

    @FXML
    private ChoiceBox<String> fgh;

    @FXML
    void initialize() {
        ObservableList<String> langs = 
            FXCollections.observableArrayList("Java", "JavaScript", "C#", "Python");
        asd = new ComboBox<>(langs);
        fgh = new ChoiceBox<>(langs);

    }
}

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-    Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0"     xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="TestFXController">
   <children>
      <ComboBox fx:id="asd" prefWidth="150.0" />
      <ChoiceBox fx:id="fgh" layoutX="14.0" layoutY="70.0" prefWidth="150.0" />
   </children>
</AnchorPane>

What's wrong. I want this result.

https://metanit.com/java/javafx/pics/4.16.png

Upvotes: 0

Views: 972

Answers (2)

Matt
Matt

Reputation: 3187

Alternatively to what Robert said if you want less code in your project you can add the items into the fxml like so

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="TestFXController">
    <children>
        <ComboBox fx:id="asd" prefWidth="150.0">
            <items>
                <FXCollections fx:factory="observableArrayList">
                    <String fx:value="Java" />
                    <String fx:value="JavaScript" />
                    <String fx:value="C#" />
                    <String fx:value="Python" />
                </FXCollections>
            </items>
        </ComboBox>
        <ChoiceBox fx:id="fgh" layoutX="14.0" layoutY="70.0" prefWidth="150.0">
            <items>
                <FXCollections fx:factory="observableArrayList">
                    <String fx:value="Java" />
                    <String fx:value="JavaScript" />
                    <String fx:value="C#" />
                    <String fx:value="Python" />
                </FXCollections>
            </items>
        </ChoiceBox>
    </children>
</AnchorPane>

Upvotes: 1

Robert
Robert

Reputation: 470

Your Combo box and Choice box already exists as long as they have to correct fx:ids set in your FXML (asd, and fgh), so you don't need the following: 

asd = new ComboBox<>(langs);
fgh = new ChoiceBox<>(langs);

From your initialize method you can for example set your items in the combo box like this:

ObservableList<String> langs = FXCollections.observableArrayList("Java", "JavaScript", "C#", "Python");
asd.setItems(langs);

That should work fine, it does for me as you can see in the image below, as long as you've got the correct fx:id set (which you look to have).

enter image description here

Hope it helps :)

Upvotes: 2

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