Java - JavaFx之fxml文件的編寫及基本使用方式

1. fxml文件基本編寫方式，加載和根據id獲取組件

src/main/resources/main.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml" fx:controller="top.onefine.control.MainCtl"
            prefHeight="400.0" prefWidth="600.0">
    <children>
        <Button text="按鈕1" prefWidth="100" prefHeight="36" id="b1">
            <AnchorPane.leftAnchor>100</AnchorPane.leftAnchor>
            <AnchorPane.topAnchor>100</AnchorPane.topAnchor>
        </Button>
    </children>

</AnchorPane>

src/main/java/top/onefine/Main.java：

package top.onefine;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

import java.io.File;
import java.io.FileInputStream;
import java.net.URL;


public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.getIcons().add(new Image("Icon.png"));  // 設置圖標
        primaryStage.setTitle("條碼識別");
        primaryStage.setWidth(1680);
        primaryStage.setHeight(1050);

        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        // 加載方式一
//        AnchorPane root = (AnchorPane) fx.load(new FileInputStream(resource.getPath()));
        // 加載方式二
        fx.setLocation(resource);
        AnchorPane root = (AnchorPane) fx.load();

        // 獲取fxml中的組件
        Button b1 = (Button) root.lookup("#b1");// b1爲要獲取組件Button的id名
        b1.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("點擊了" + ((Button) event.getSource()).getText());
            }
        });

        Scene scene = new Scene(root);  // 場景

        primaryStage.setScene(scene);

        primaryStage.show();

    }

}

2. 控制器controller

src/main/resources/main.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml"
            fx:controller="top.onefine.control.MainCtl"
            prefHeight="400.0" prefWidth="600.0">
    <children>
        <Label fx:id="label" id="label" text="標籤"/>
        <Button fx:id="b1" id="b1" text="按鈕1" prefWidth="100" prefHeight="36" onAction="#b1_action">
            <AnchorPane.leftAnchor>100</AnchorPane.leftAnchor>
            <AnchorPane.topAnchor>100</AnchorPane.topAnchor>
        </Button>
    </children>

</AnchorPane>

src/main/java/top/onefine/control/MainCtl.java：

package top.onefine.control;

import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;


/**
 * 控制器
 */
public class MainCtl {
    public MainCtl() {
        System.out.println("加載了類");
    }

    @FXML  // 獲取main.fxml中id爲b1的引用
    private Button b1;

    @FXML
    private Label label;

    public Button getB1() {
        return b1;
    }

    public void setB1(Button b1) {
        this.b1 = b1;
    }

    public Label getLabel() {
        return label;
    }

    public void setLabel(Label label) {
        this.label = label;
    }

    @FXML  // 處理事件，對應：onAction="#b1_action"
    private void b1_action() {
        System.out.println("點擊了");
    }

    @FXML  // 初始化方法
    private void initialize() {
        System.out.println("初始化了");
//        System.out.println(label.getText());
//        System.out.println(b1.getText());
    }


}

src/main/java/top/onefine/client/Main.java：

package top.onefine.client;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
import top.onefine.control.MainCtl;

import java.net.URL;

public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.getIcons().add(new Image("Icon.png"));  // 設置圖標
        primaryStage.setTitle("條碼識別");
        primaryStage.setWidth(1680);
        primaryStage.setHeight(1050);

        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        // 加載方式一
//        AnchorPane root = (AnchorPane) fx.load(new FileInputStream(resource.getPath()));
        // 加載方式二
        fx.setLocation(resource);
        AnchorPane root = (AnchorPane) fx.load();

        // 獲取fxml中的組件
//        Button b1 = (Button) root.lookup("#b1");// b1爲要獲取組件Button的id名
//        b1.setOnAction(new EventHandler<ActionEvent>() {
//            @Override
//            public void handle(ActionEvent event) {
//                System.out.println("點擊了" + ((Button) event.getSource()).getText());
//            }
//        });

        // 獲取控制器，對控制器中的按鈕進行監聽綁定
        // 注意：這會使得控制器中b1按鈕的監聽失效
        MainCtl controller = (MainCtl) fx.getController();
        controller.getB1().setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("又點擊了！");
            }
        });


        Scene scene = new Scene(root);  // 場景

        primaryStage.setScene(scene);

        primaryStage.show();

    }

}

2. 設置圖片，佈局，列表數據，切換佈局

src/main/resources/main.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<?import javafx.scene.image.ImageView?>
<?import javafx.scene.image.Image?>
<?import javafx.collections.FXCollections?>
<AnchorPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml"
            fx:controller="top.onefine.control.MainCtl"
            prefHeight="400.0" prefWidth="600.0">
    <children>
        <Label fx:id="label" id="label" text="標籤"
               AnchorPane.topAnchor="100" AnchorPane.leftAnchor="100"/>
        <Button fx:id="b1" id="b1" prefWidth="100" prefHeight="36"
                AnchorPane.topAnchor="100" AnchorPane.leftAnchor="200">
            <String fx:value="按鈕1" />
        </Button>

        <!-- 加載圖片 -->
        <ImageView AnchorPane.topAnchor="300" AnchorPane.leftAnchor="100"
            fitHeight="600" preserveRatio="true">  <!-- preserveRatio保持圖片寬高比例 -->
            <Image url="@demoPhoto.png" />
        </ImageView>

        <!-- 佈局 -->
        <BorderPane style="-fx-background-color: #FFFF55" prefWidth="600" prefHeight="200" AnchorPane.leftAnchor="300">
            <left>
                <ListView fx:id="list" prefWidth="200" prefHeight="200">
                    <!--
                    <items>
                        <FXCollections fx:factory="observableArrayList">
                            <String fx:value="data1" />
                            <String fx:value="data2" />
                            <String fx:value="data3" />
                            <String fx:value="data4" />
                        </FXCollections>
                    </items>
                    -->
                </ListView>
            </left>
            <right>
                <ComboBox>
                    <items>
                        <FXCollections fx:factory="observableArrayList">
                            <String fx:value="data1" />
                            <String fx:value="data2" />
                            <String fx:value="data3" />
                            <String fx:value="data4" />
                        </FXCollections>
                    </items>
                </ComboBox>
            </right>
        </BorderPane>

    </children>

</AnchorPane>

src/main/resources/other.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane xmlns="http://javafx.com/javafx"
            xmlns:fx="http://javafx.com/fxml"
            fx:controller="top.onefine.control.Other"
            prefHeight="400.0" prefWidth="600.0">
    <Button text="哈哈哈回不去了" onAction="#button_action"/>
</AnchorPane>

src/main/java/top/onefine/control/MainCtl.java：

package top.onefine.control;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;


/**
 * 控制器
 */
public class MainCtl {
    public MainCtl() {
        System.out.println("加載了類");
    }

    @FXML  // 獲取main.fxml中id爲b1的引用
    private Button b1;

    @FXML
    private Label label;

    @FXML
    private ListView<String> list;

    public Button getB1() {
        return b1;
    }

    public void setB1(Button b1) {
        this.b1 = b1;
    }

    public Label getLabel() {
        return label;
    }

    public void setLabel(Label label) {
        this.label = label;
    }

    public ListView<String> getList() {
        return list;
    }

    public void setList(ListView<String> list) {
        this.list = list;
    }

    @FXML  // 初始化方法
    private void initialize() {
        ObservableList<String> objlist = FXCollections.observableArrayList();
        objlist.add("data1");
        objlist.add("data2");
        objlist.add("data3");
        objlist.add("data4");
        objlist.add("data5");
        list.setItems(objlist);

        list.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
                System.out.println("選中了：" + newValue);
            }
        });
    }


}

src/main/java/top/onefine/control/Other.java：

package top.onefine.control;

import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

import java.io.IOException;

public class Other {
    public Other() {
    }

    @FXML
    private void button_action() {
        FXMLLoader f1 = new FXMLLoader();
        f1.setLocation(getClass().getClassLoader().getResource("other.fxml"));
        try {
            AnchorPane an = (AnchorPane) f1.load();
            Stage stage = new Stage();
            Scene scene = new Scene(an);
            stage.setScene(scene);
            stage.show();
        } catch (IOException e) {
            e.printStackTrace();
            Platform.exit();
        }
    }

    @FXML
    private void initialize() {}
}

src/main/java/top/onefine/client/Main.java：

package top.onefine.client;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
import top.onefine.control.MainCtl;

import java.io.IOException;
import java.net.URL;

public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.getIcons().add(new Image("Icon.png"));  // 設置圖標
        primaryStage.setTitle("條碼識別");
//        primaryStage.setWidth(1680);
//        primaryStage.setHeight(1050);
        primaryStage.setWidth(1600);
        primaryStage.setHeight(900);

        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        fx.setLocation(resource);
        AnchorPane root = null;
        try {
            root = (AnchorPane) fx.load();
        } catch (IOException e) {
            e.printStackTrace();
            Platform.exit();
            return;
        }

        Scene scene = new Scene(root);  // 場景
        primaryStage.setScene(scene);

        // 點擊button時切換場景
        MainCtl controller = (MainCtl) fx.getController();  // 獲取控制器——Main對應的控制類
        controller.getB1().setOnMouseClicked(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                FXMLLoader fx2 = new FXMLLoader();
                fx2.setLocation(getClass().getClassLoader().getResource("other.fxml"));
                try {
                    AnchorPane ohter = (AnchorPane) fx2.load();
                    scene.setRoot(ohter);  // 切換場景
                } catch (IOException e) {
                    e.printStackTrace();
                    Platform.exit();
                }

            }
        });



        primaryStage.show();
    }

}

3. 利用Builder和BuilderFactory接口，讀取自定義FXML標籤

3.1 Builder和BuilderFactory接口1

src/main/java/top/onefine/demo/javafx/Person.java：

package top.onefine.demo.javafx;

public class Person {
    private String name;
    private Integer age;

    // 默認使用無參構造函數初始化對象
//    public Person() {
//    }

    public Person(String name, Integer age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

src/main/java/top/onefine/demo/javafx/PersonBuilder.java：

package top.onefine.demo.javafx;

import javafx.util.Builder;

public class PersonBuilder implements Builder<Person> {
    @Override
    public Person build() {
        return new Person(name, age);
    }

    private String name;
    private Integer age;

    public String getName() {
        return name;
    }

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

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

src/main/java/top/onefine/demo/javafx/PersonBuilderFactory.java：

package top.onefine.demo.javafx;

import javafx.fxml.JavaFXBuilderFactory;
import javafx.util.Builder;
import javafx.util.BuilderFactory;

public class PersonBuilderFactory implements BuilderFactory {

    private final JavaFXBuilderFactory bf = new JavaFXBuilderFactory();

    @Override
    public Builder<?> getBuilder(Class<?> type) {
        if (type == Person.class) {
            System.out.println("xxxxxx");
            // 特別奇怪，這裏既不能用內部類又不能直接返回匿名實現類...
            /**
            return new Builder<Person>() {
                @Override
                public Person build() {
                    return new Person(name, age);
                }

                private String name;
                private Integer age;

                public String getName() {
                    return name;
                }

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

                public Integer getAge() {
                    return age;
                }

                public void setAge(Integer age) {
                    this.age = age;
                }
            };**/
            return new PersonBuilder();
        }
        System.out.println("hhhhhhh");  // 這句也奇怪，也是執行不到...
        return bf.getBuilder(type);
    }
}

src/main/resources/main_demo.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import top.onefine.demo.javafx.Person?>

<!--<AnchorPane xmlns="http://javafx.com/javafx"-->
<!--            xmlns:fx="http://javafx.com/fxml"-->
<!--            fx:controller="top.onefine.demo.javafx.MainCtrDemo"-->
<!--            prefHeight="400.0" prefWidth="600.0">-->

<!--</AnchorPane>-->

<Person name="onefine" age="18">

</Person>

src/main/java/top/onefine/demo/javafx/TestDemo.java：

package top.onefine.demo.javafx;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;

import java.net.URL;

public class TestDemo extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main_demo.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        fx.setLocation(resource);
        // 使用帶參數的構造方法，替換默認的無參構造方法
        fx.setBuilderFactory(new PersonBuilderFactory());

        Person person = (Person) fx.load();
        System.out.println(person.getName());
//        Scene scene = new Scene(root);
//        primaryStage.setScene(scene);
        primaryStage.setTitle("demo");
        primaryStage.show();
    }
}

3.2 Builder和BuilderFactory接口2

src/main/java/top/onefine/demo/javafx/PersonBuilderMap.java：

package top.onefine.demo.javafx;

import javafx.util.Builder;

import java.util.HashMap;

public class PersonBuilderMap extends HashMap<String, Object> implements Builder<Person> {
    private String name;
    private Integer age;

    @Override
    public Object put(String key, Object value) {
//        return super.put(key, value);
        if ("name".equals(key))
            this.name = String.valueOf(value);
        else if ("age".equals(key))
            this.age = Integer.valueOf(String.valueOf(value));
        return null;
    }

    @Override
    public Person build() {
        return new Person(name, age);
    }
}

src/main/java/top/onefine/demo/javafx/PersonBuilderFactoryMap.java：

package top.onefine.demo.javafx;

import javafx.fxml.JavaFXBuilderFactory;
import javafx.util.Builder;
import javafx.util.BuilderFactory;

public class PersonBuilderFactoryMap implements BuilderFactory {

    private final JavaFXBuilderFactory bf = new JavaFXBuilderFactory();

    @Override
    public Builder<?> getBuilder(Class<?> type) {
        if (type == Person.class) {
            System.out.println("xxxxxx");
            return new PersonBuilderMap();
        }
        System.out.println("hhhhhhh");  // 這句也奇怪，也是執行不到...
        return bf.getBuilder(type);
    }
}

src/main/resources/main_demo.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import top.onefine.demo.javafx.Person?>

<!--<AnchorPane xmlns="http://javafx.com/javafx"-->
<!--            xmlns:fx="http://javafx.com/fxml"-->
<!--            fx:controller="top.onefine.demo.javafx.MainCtrDemo"-->
<!--            prefHeight="400.0" prefWidth="600.0">-->

<!--</AnchorPane>-->

<ArrayList>
    <Person name="one" age="18" />
    <Person name="fine" age="17" />
    <Person name="one fine" age="16" />
</ArrayList>

src/main/java/top/onefine/demo/javafx/TestDemo.java：

package top.onefine.demo.javafx;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;

import java.net.URL;
import java.util.ArrayList;

public class TestDemo extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main_demo.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        fx.setLocation(resource);
        // 使用帶參數的構造方法，替換默認的無參構造方法
//        fx.setBuilderFactory(new PersonBuilderFactory());
        fx.setBuilderFactory(new PersonBuilderFactoryMap());

        ArrayList<Person> personList = (ArrayList<Person>) fx.load();
        System.out.println(personList.size());
//        Scene scene = new Scene(root);
//        primaryStage.setScene(scene);
        primaryStage.setTitle("demo");
        primaryStage.show();
    }
}

執行結果：

hhhhhhh
xxxxxx
xxxxxx
xxxxxx
3

4. fxml文件補充

src/main/resources/main_demo.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<?import javafx.geometry.Insets?>
<?import javafx.geometry.Pos?>
<AnchorPane xmlns="http://javafx.com/javafx"
            xmlns:fx="http://javafx.com/fxml"
            fx:controller="top.onefine.demo.javafx.MainCtrDemo"
            prefHeight="400.0" prefWidth="600.0">
    <fx:define>
        <ToggleGroup fx:id="group" />
        <Insets fx:id="margin" top="0" left="0" bottom="10" right="10" />

        <Button fx:id="bu" text="button"  prefWidth="120"/>
    </fx:define>

    <HBox prefWidth="400" prefHeight="200" spacing="10" alignment="CENTER">
        <!-- 設置對齊方式 -->
<!--        <alignment>-->
<!--            <Pos fx:constant="CENTER" />-->
<!--        </alignment>-->
        <RadioButton text="A" toggleGroup="$group" />
        <RadioButton text="B" toggleGroup="$group" />
        <RadioButton text="C" toggleGroup="$group" />

        <Button text="hello" HBox.margin="$margin" prefWidth="120"/>
        <Button text="world" HBox.margin="$margin" prefWidth="120" />

        <fx:reference source="bu" />  <!-- 引用 ，注意只能引用一次-->

        <!-- 導入其他fxml -->
        <fx:include source="other_demo.fxml" />
    </HBox>

    <!-- 使用b1的屬性 -->
    <Button AnchorPane.topAnchor="300.0" fx:id="b1" text="button1" prefWidth="100" />
    <Button AnchorPane.topAnchor="400.0" text="button2" prefWidth="${b1.prefWidth}" />
</AnchorPane>

src/main/resources/other_demo.fxml：

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<!--<AnchorPane xmlns="http://javafx.com/javafx"-->
<!--            xmlns:fx="http://javafx.com/fxml"-->
<!--            fx:controller="OtherDemo"-->
<!--            prefHeight="400.0" prefWidth="600.0">-->

<!--</AnchorPane>-->
<Button text="otherButton"/>

src/main/java/top/onefine/demo/javafx/TestDemo.java：

package top.onefine.demo.javafx;

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

import java.net.URL;

public class TestDemo extends Application {
    public static void main(String[] args) {
        Application.launch(args);
//        System.out.println(System.getProperty("java.version"));
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        FXMLLoader fx = new FXMLLoader();

        // 加載類路徑下的資源
        URL resource = getClass().getClassLoader().getResource("main_demo.fxml");
        if (resource == null)
            throw new RuntimeException("資源文件找不到");

        fx.setLocation(resource);

        AnchorPane anchorPane = (AnchorPane) fx.load();
        Scene scene = new Scene(anchorPane);
        primaryStage.setScene(scene);
        primaryStage.setTitle("demo");
        primaryStage.setHeight(500);
        primaryStage.setWidth(800);
        primaryStage.show();
    }
}

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