JAVAFX ListView chatting - javafx

Question

I need to insert values in list view in one by one like chatting.
now my code is
#FXML
private ListView<String> messageList;
private ObservableList<String> messages = FXCollections.observableArrayList();
messageList.setItems(messages);

Answer 1

This may be similar to what you are asking.
Main:
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class ChatApp extends Application {
#Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
Controller:
import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
public class FXMLDocumentController implements Initializable {
#FXML private ListView lvChatWindow;
#FXML private TextField tfUser1, tfUser2;
ObservableList<String> chatMessages = FXCollections.observableArrayList();//create observablelist for listview
//Method use to handle button press that submits the 1st user's text to the listview.
#FXML
private void handleUser1SubmitMessage(ActionEvent event) {
chatMessages.add("User 1: " + tfUser1.getText());//get 1st user's text from his/her textfield and add message to observablelist
tfUser1.setText("");//clear 1st user's textfield
}
//Method use to handle button press that submits the 2nd user's text to the listview.
#FXML
private void handleUser2SubmitMessage(ActionEvent event) {
chatMessages.add("User 2: " + tfUser2.getText());//get 2nd user's text from his/her textfield and add message to observablelist
tfUser2.setText("");//clear 2nd user's textfield
}
#Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
lvChatWindow.setItems(chatMessages);//attach the observablelist to the listview
}
}
FXML:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane id="AnchorPane" prefHeight="349.0" prefWidth="549.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.60" fx:controller="chatapp.FXMLDocumentController">
<children>
<Button fx:id="bntUser1Send" layoutX="99.0" layoutY="299.0" onAction="#handleUser1SubmitMessage" text="send message user1" />
<Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
<Button fx:id="btnUser2Send" layoutX="351.0" layoutY="299.0" mnemonicParsing="false" onAction="#handleUser2SubmitMessage" text="send message user2" />
<ListView fx:id="lvChatWindow" layoutX="75.0" layoutY="29.0" prefHeight="200.0" prefWidth="419.0" />
<TextField fx:id="tfUser1" layoutX="36.0" layoutY="258.0" prefHeight="25.0" prefWidth="239.0" />
<TextField fx:id="tfUser2" layoutX="293.0" layoutY="258.0" prefHeight="25.0" prefWidth="239.0" />
</children>
</AnchorPane>
This app simulates two different users sending messages to one listview. Similar to a chat. More comments in Controller