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前提

使用自带javafx的jdk，这里使用的是jdk1.834，当然你可以使用其他的可行版本。

步骤

1. 普通类继承Application

public class server extends Application {

2. 实现main方法

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

3. 写一个controller

普通类实现implements Initializable即可

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;import java.net.URL;
import java.util.ResourceBundle;public class controller implements Initializable {@FXMLprivate TextArea allStatus;@FXMLprivate TextArea pkRecord;@FXMLprivate Label mount;@FXMLprivate Label monitorStatus;@Overridepublic void initialize(URL location, ResourceBundle resources) {System.out.println(2222);}
}

4. 写一个fxml文件

将fxml文件放在项目的resources目录下，后面好引用。另外，重要的是在GridPane节点上增加和controller类的关系，使用fx:controller=“controller”

<?xml version="1.0" encoding="UTF-8"?><?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?><GridPane fx:controller="controller" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"><columnConstraints><ColumnConstraints hgrow="SOMETIMES" maxWidth="302.0" minWidth="10.0" prefWidth="158.0" /><ColumnConstraints hgrow="SOMETIMES" maxWidth="324.0" minWidth="10.0" prefWidth="285.0" /><ColumnConstraints hgrow="SOMETIMES" maxWidth="140.0" minWidth="10.0" prefWidth="140.0" /></columnConstraints><rowConstraints><RowConstraints maxHeight="128.0" minHeight="4.0" prefHeight="4.0" vgrow="SOMETIMES" /><RowConstraints maxHeight="303.0" minHeight="10.0" prefHeight="303.0" vgrow="SOMETIMES" /><RowConstraints maxHeight="124.0" minHeight="10.0" prefHeight="41.0" vgrow="SOMETIMES" /></rowConstraints><children><TextArea fx:id="allStatus" prefHeight="200.0" prefWidth="200.0" GridPane.columnIndex="1" GridPane.rowIndex="1"><GridPane.margin><Insets right="10.0" /></GridPane.margin></TextArea><TextArea fx:id="pkRecord" prefHeight="200.0" prefWidth="200.0" GridPane.rowIndex="1"><GridPane.margin><Insets left="10.0" right="10.0" /></GridPane.margin></TextArea><VBox alignment="TOP_CENTER" prefHeight="200.0" prefWidth="100.0" GridPane.columnIndex="2" GridPane.rowIndex="1"><children><Label fx:id="mount" prefHeight="36.0" prefWidth="140.0" text="Label"><opaqueInsets><Insets /></opaqueInsets><VBox.margin><Insets bottom="20.0" /></VBox.margin></Label><Label fx:id="monitorStatus" prefHeight="39.0" prefWidth="140.0" text="Label" /></children></VBox></children>
</GridPane>

5. 写start方法加载fxml

  @Overridepublic void start(Stage primaryStage) throws IOException {Parent root = FXMLLoader.load(getClass().getResource("/monitor.fxml"));primaryStage.setTitle("KeDD");primaryStage.setResizable(false);primaryStage.setScene(new Scene(root, 800, 500));primaryStage.show();}

6. 具体代码

import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.omg.CORBA.portable.ApplicationException;
import java.io.IOException;public class server extends Application {public static void main(String[] args) {launch();}@Overridepublic void start(Stage primaryStage) throws IOException {Parent root = FXMLLoader.load(getClass().getResource("/monitor.fxml"));primaryStage.setTitle("KeDD");primaryStage.setResizable(false);primaryStage.setScene(new Scene(root, 800, 500));primaryStage.show();}
}

7. 运行即可

运行后会弹出窗口，然后打印出上面的2222