JAVAFX ComboBox does not display value names correctly [duplicate] - javafx

Question

This question already has an answer here:
How do I add a value to items in a ComboBox in JavaFX
(1 answer)
Closed 4 years ago.
Hi I am trying to populate data from a database into a Combo Box, but when I click on the dropdown menu, it does not list the names of the items correctly. I can't figure out why.
Here is what appears when I click on the combobox image
Any help is appreciated thanks!
Edit:I tried using a String Converter but it still does not display the output . Did I use the String Converter correctly?
OrderController class
package sample;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.fxml.FXML;
import javafx.scene.control.TableColumn;
import javafx.event.ActionEvent;
import javafx.scene.control.ComboBox;
import javafx.stage.Stage;
import java.io.IOException;
import java.net.URL;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ResourceBundle;
public class Ordercontroller implements Initializable {
#FXML ComboBox<Orderitems> itemdropdown;
#FXML ComboBox<String> droppax;
#FXML ComboBox<String> tablenum;
#FXML
ObservableList<Orderitems> choice = FXCollections.observableArrayList();
ObservableList<String> pax =
FXCollections.observableArrayList("1","2","3","4","5","6","7");
ObservableList<String> tableno =
FXCollections.observableArrayList("1","2","3","4","5","6","7");
#Override
public void initialize(URL location, ResourceBundle resources) {
itemdrop();
}
public void itemdrop(){
itemdropdown.setValue(null);
itemdropdown.setItems(choice);
droppax.setItems(pax);
tablenum.setItems(tableno);
try {
Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
String path = "C:\\Users\\franc\\Desktop\\Database\\CSIA1.accdb";
String url = "jdbc:ucanaccess://" + path;
Connection conn = DriverManager.getConnection(url);
Statement st = conn.createStatement();
String sql = "Select * from Menu";
ResultSet rs = st.executeQuery(sql);
while (rs.next()) {
choice.add(new Orderitems(rs.getString("Item")));
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
Orderitems class
package sample;
import java.awt.*;
import javafx.util.StringConverter;
public class Orderitems extends Ordercontroller{
String Item;
Ordercontroller order = new Ordercontroller();
public Orderitems(String item) {
this.Item = item;
}
public String getItem() {
return Item;
}
public void setItem(String item) {
Item = item;
}
public void start() throws Exception{
itemdropdown.setConverter(new StringConverter<Orderitems>() {
#Override
public String toString(Orderitems object) {
return null;
}
#Override
public Orderitems fromString(String string) {
return null;
}
});}}
Order FXML file
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="400.0" prefWidth="600.0"
xmlns="http://javafx.com/javafx/8.0.172-ea"
xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Ordercontroller">
<children>
<TableView fx:id="Ordertable" layoutX="204.0" layoutY="51.0"
prefHeight="200.0" prefWidth="345.0">
<columns>
<TableColumn fx:id="Oitem" prefWidth="75.0" text="Item" />
<TableColumn fx:id="Oprice" prefWidth="75.0" text="Price" />
<TableColumn fx:id="Ospecial" prefWidth="155.0" text="Special
Requests" />
</columns>
</TableView>
<Button layoutX="475.0" layoutY="266.0" mnemonicParsing="false" text="Add
Item" />
<Label layoutX="38.0" layoutY="238.0" text="Table Number" />
<TextArea fx:id="specialreq" layoutX="278.0" layoutY="352.0"
prefHeight="65.0" prefWidth="200.0" text="Special Requests" />
<Button layoutX="82.0" layoutY="312.0" mnemonicParsing="false" text="Load" />
<Label layoutX="68.0" layoutY="68.0" text="No. of Pax" />
<Button layoutX="496.0" layoutY="369.0" mnemonicParsing="false" text="Add"
/>
<Button layoutX="473.0" layoutY="308.0" mnemonicParsing="false"
text="Delete Item" />
<ComboBox fx:id="itemdropdown" layoutX="308.0" layoutY="270.0"
onAction="#itemdrop" prefWidth="150.0" />
<ComboBox fx:id="tablenum" layoutX="34.0" layoutY="270.0"
prefWidth="150.0" />
<ComboBox fx:id="droppax" layoutX="34.0" layoutY="96.0" prefWidth="150.0"
/>
<Button layoutX="28.0" layoutY="14.0" mnemonicParsing="false"
onAction="#returnhome" text="Exit" />
</children>
</AnchorPane>

Answer 1

Try implementing toString on your OrderItem class.
#Override
public String toString() {
return item;
}