javafx
Windows

Creando una nueva ventana

Para mostrar algo de contenido en una nueva ventana, se necesita crear un Stage . Después de la creación e inicialización show debe showAndWait a showAndWait en el objeto Stage :

// create sample content
Rectangle rect = new Rectangle(100, 100, 200, 300);
Pane root = new Pane(rect);
root.setPrefSize(500, 500);

Parent content = root;

// create scene containing the content
Scene scene = new Scene(content);

Stage window = new Stage();
window.setScene(scene);

// make window visible
window.show();

Nota: este código debe ejecutarse en el subproceso de la aplicación JavaFX.

Creación de un diálogo personalizado

Puede crear diálogos personalizados que contienen muchos componentes y realizar muchas funciones en ellos. Se comporta como segunda etapa en el escenario propietario.
En el siguiente ejemplo, una aplicación que muestra a la persona en la vista de tabla del escenario principal y crea una persona en un diálogo (AddingPersonDialog) preparada. GUI creadas por SceneBuilder, pero pueden crearse mediante códigos Java puros.

Aplicación de muestra:

AppMain.java

package customdialog;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class AppMain extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
        Scene scene = new Scene(root, 500, 500);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

}

AppMainController.java

package customdialog;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class AppMainController implements Initializable {

    @FXML
    private TableView<Person> tvData;
    @FXML
    private TableColumn colId;
    @FXML
    private TableColumn colName;
    @FXML
    private TableColumn colAge;

    private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();

    @FXML
    void onOpenDialog(ActionEvent event) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
        Parent parent = fxmlLoader.load();
        AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
        dialogController.setAppMainObservableList(tvObservableList);

        Scene scene = new Scene(parent, 300, 200);
        Stage stage = new Stage();
        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setScene(scene);
        stage.showAndWait();
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        colId.setCellValueFactory(new PropertyValueFactory<>("id"));
        colName.setCellValueFactory(new PropertyValueFactory<>("name"));
        colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
        tvData.setItems(tvObservableList);
    }

}

AppMain.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>

<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
   <children>
      <VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
         <children>
            <Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
            <TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
              <columns>
                <TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
                <TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
                  <TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
              </columns>
               <columnResizePolicy>
                  <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
               </columnResizePolicy>
            </TableView>
         </children>
      </VBox>
   </children>
</AnchorPane>

AddPersonDialogController.java

package customdialog;

import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class AddPersonDialogController  {
    
    @FXML
    private TextField tfId;

    @FXML
    private TextField tfName;

    @FXML
    private TextField tfAge;
    
    private ObservableList<Person> appMainObservableList;

    @FXML
    void btnAddPersonClicked(ActionEvent event) {
        System.out.println("btnAddPersonClicked");
        int id = Integer.valueOf(tfId.getText().trim());
        String name = tfName.getText().trim();
        int iAge = Integer.valueOf(tfAge.getText().trim());
        
        Person data = new Person(id, name, iAge);
        appMainObservableList.add(data);
        
        closeStage(event);
    }

    public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
        this.appMainObservableList = tvObservableList;
        
    }

    private void closeStage(ActionEvent event) {
        Node  source = (Node)  event.getSource(); 
        Stage stage  = (Stage) source.getScene().getWindow();
        stage.close();
    }

}

AddPersonDialog.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>

<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
   <children>
      <VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
         <children>
            <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
                  <TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
                  <TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
                  <TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER_RIGHT">
               <children>
                  <Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
               </children>
               <opaqueInsets>
                  <Insets />
               </opaqueInsets>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
         </children>
      </VBox>
   </children>
</AnchorPane>

Persona.java

package customdialog;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;

public class Person {

    private SimpleIntegerProperty id;
    private SimpleStringProperty name;
    private SimpleIntegerProperty age;

    public Person(int id, String name, int age)  {
        this.id = new SimpleIntegerProperty(id);
        this.name = new SimpleStringProperty(name);
        this.age = new SimpleIntegerProperty(age);
    }

    public int getId() {
        return id.get();
    }

    public void setId(int ID) {
        this.id.set(ID);
    }

    public String getName() {
        return name.get();
    }

    public void setName(String nme) {
        this.name.set(nme);
    }

    public int getAge() {
        return age.get();
    }

    public void setAge(int age) {
        this.age.set(age);
    }

    @Override
    public String toString() {
        return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
    }

}

Captura de pantalla

Creación de un diálogo personalizado

Puede crear diálogos personalizados que contienen muchos componentes y realizar muchas funciones en ellos. Se comporta como segunda etapa en el escenario propietario.
En el siguiente ejemplo, una aplicación que muestra a la persona en la vista de tabla del escenario principal y crea una persona en un diálogo (AddingPersonDialog) preparada. GUI creadas por SceneBuilder, pero pueden crearse mediante códigos Java puros.

Aplicación de muestra:

AppMain.java

package customdialog;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class AppMain extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
        Scene scene = new Scene(root, 500, 500);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

}

AppMainController.java

package customdialog;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class AppMainController implements Initializable {

    @FXML
    private TableView<Person> tvData;
    @FXML
    private TableColumn colId;
    @FXML
    private TableColumn colName;
    @FXML
    private TableColumn colAge;

    private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();

    @FXML
    void onOpenDialog(ActionEvent event) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
        Parent parent = fxmlLoader.load();
        AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
        dialogController.setAppMainObservableList(tvObservableList);

        Scene scene = new Scene(parent, 300, 200);
        Stage stage = new Stage();
        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setScene(scene);
        stage.showAndWait();
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        colId.setCellValueFactory(new PropertyValueFactory<>("id"));
        colName.setCellValueFactory(new PropertyValueFactory<>("name"));
        colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
        tvData.setItems(tvObservableList);
    }

}

AppMain.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>

<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
   <children>
      <VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
         <children>
            <Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
            <TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
              <columns>
                <TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
                <TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
                  <TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
              </columns>
               <columnResizePolicy>
                  <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
               </columnResizePolicy>
            </TableView>
         </children>
      </VBox>
   </children>
</AnchorPane>

AddPersonDialogController.java

package customdialog;

import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class AddPersonDialogController  {
    
    @FXML
    private TextField tfId;

    @FXML
    private TextField tfName;

    @FXML
    private TextField tfAge;
    
    private ObservableList<Person> appMainObservableList;

    @FXML
    void btnAddPersonClicked(ActionEvent event) {
        System.out.println("btnAddPersonClicked");
        int id = Integer.valueOf(tfId.getText().trim());
        String name = tfName.getText().trim();
        int iAge = Integer.valueOf(tfAge.getText().trim());
        
        Person data = new Person(id, name, iAge);
        appMainObservableList.add(data);
        
        closeStage(event);
    }

    public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
        this.appMainObservableList = tvObservableList;
        
    }

    private void closeStage(ActionEvent event) {
        Node  source = (Node)  event.getSource(); 
        Stage stage  = (Stage) source.getScene().getWindow();
        stage.close();
    }

}

AddPersonDialog.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>

<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
   <children>
      <VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
         <children>
            <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
                  <TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
                  <TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
                  <TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER_RIGHT">
               <children>
                  <Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
               </children>
               <opaqueInsets>
                  <Insets />
               </opaqueInsets>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
         </children>
      </VBox>
   </children>
</AnchorPane>

Persona.java

package customdialog;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;

public class Person {

    private SimpleIntegerProperty id;
    private SimpleStringProperty name;
    private SimpleIntegerProperty age;

    public Person(int id, String name, int age)  {
        this.id = new SimpleIntegerProperty(id);
        this.name = new SimpleStringProperty(name);
        this.age = new SimpleIntegerProperty(age);
    }

    public int getId() {
        return id.get();
    }

    public void setId(int ID) {
        this.id.set(ID);
    }

    public String getName() {
        return name.get();
    }

    public void setName(String nme) {
        this.name.set(nme);
    }

    public int getAge() {
        return age.get();
    }

    public void setAge(int age) {
        this.age.set(age);
    }

    @Override
    public String toString() {
        return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
    }

}

Captura de pantalla