Java：JavaFX项目FXML文件应用实例

── src   
    ├── com
    │   └── company
    │       ├── Controller.java   # 控制器文件
    │       ├── Main.java         # 主文件
    │       └── sample.fxml       # 布局文件
    └── style
        └── main.css               # 样式文件

package com.company;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage primaryStage) throws Exception {
         // 此处引入布局文件
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        Scene scene = new Scene(root);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

<?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 prefHeight="400.0" prefWidth="600.0" stylesheets="@../../style/main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.company.Controller">
   <children>
      <Button layoutX="271.0" layoutY="165.0" mnemonicParsing="false" onAction="#clickButton" text="这是一个按钮" />
      <Label fx:id="label" layoutX="308.0" layoutY="126.0" />
   </children>
</AnchorPane>

package com.company;
import javafx.scene.control.Label;
public class Controller {
    public Label label;
    public void clickButton(){
        label.setText("按钮被点击了");
        System.out.println("按钮被点击了");
    }
}

.label{
    -fx-text-fill: red;
}