Question

我当前的项目是带有RMI的JavaFX应用程序。目前我有两个三个班级，我想减少到两个，但我无法知道如何。

三个班级： StartClient.java BannerController.java AEXBanner.java

代码和错误消息：

java.lang.reflect.InvocationTargetException

at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at   sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）     在   sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）     在java.lang.reflect.Method.invoke（Method.java:497）at   com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs（LauncherImpl.java:389）     在   com.sun.javafx.application.LauncherImpl.launchApplication（LauncherImpl.java:328）     at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at   sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）     在   sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）     在java.lang.reflect.Method.invoke（Method.java:497）at   sun.launcher.LauncherHelper $ FXHelper.main（LauncherHelper.java:767）       引起：java.lang.IllegalStateException：不在FX应用程序线程上; currentThread = main         at com.sun.javafx.tk.Toolkit.checkFxUserThread（Toolkit.java:236）         at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread（QuantumToolkit.java:423）         在javafx.stage.Stage。（Stage.java:241）         在javafx.stage.Stage。（Stage.java:227）         在client.BannerController。（BannerController.java:71）         在client.BannerController.main（BannerController.java:174）         ......还有11个       运行应用程序client.BannerController的异常       D：\ Dropbox \ HBO ICT \ Leerjaar 2 \ GSO3 \ AEXBanner第1周\ nbproject \ build-impl.xml：1051：发生以下错误   执行此行：       D：\ Dropbox \ HBO ICT \ Leerjaar 2 \ GSO3 \ AEXBanner第1周\ nbproject \ build-impl.xml：805：Java返回：1       BUILD FAILED（总时间：17秒）

使用StartClient启动程序（在RMI服务器运行时）一切正常。但是当我使用BannerController类直接启动应用程序时，Netbeans会给我上面发布的错误。

我100％确定RMI服务器正常运行，因此无需担心。

这三个课程可以在下面找到：

StartClient：

package client;

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

/**
 *
 * @author Max
 */
public class StartClient extends Application {

    @Override
    public void start(Stage primaryStage) {
        BannerController.main(null);
    }

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

BannerController：包客户端;

/**
 *
 * @author Max
 */
import shared.IEffectenBeurs;
import shared.IFonds;
import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.util.Scanner;
import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.stage.Stage;

public class BannerController extends Application {

    private AEXBanner banner;
    private IEffectenBeurs effectenbeurs;
    private Timer pollingTimer;
    private String bindingName = "Effectenbeurs";
    private Registry registry = null;
    private static boolean locateRegistry = true;

    public BannerController(String ip, int port) {
        banner = new AEXBanner();
        pollingTimer = new Timer();

        System.out.println("Client: IP Address: " + ip);
        System.out.println("Client: Port number " + port);

        if (locateRegistry) {
            // Locate registry at IP address and port number
            registry = locateRegistry(ip, port);

            // Print result locating registry
            if (registry != null) {
                printContentsRegistry();
                System.out.println("Client: Registry located");
            } else {
                System.out.println("Client: Cannot locate registry");
                System.out.println("Client: Registry is null pointer");
            }
            if (registry != null) {
                effectenbeurs = bindEffectenbeursUsingRegistry();
            }
        } else {
            // Bind fonds using Naming
            effectenbeurs = bindEffectenbeursUsingNaming(ip, port);
        }
        if (effectenbeurs != null) {
            System.out.println("Client: Effectenbeurs bound");
        } else {
            System.out.println("Client: Effectenbeurs is null pointer");
        }
        banner.start(new Stage());
        pollingTimer.schedule(new TimerTask() {
            @Override
            public void run() {
                try {
                    StringBuilder sb = new StringBuilder();
                    for (IFonds f : effectenbeurs.getKoersen()) {
                        sb.append(f.toString() + " ");
                    }
                    System.out.println(sb.toString());
                    banner.setKoersen(sb.toString());
                } catch (RemoteException ex) {
                    Logger.getLogger(BannerController.class.getName()).log(Level.SEVERE, null, ex);
                }

            }
        }, 0, 2000);

    }

    // Print contents of registry
    private void printContentsRegistry() {
        try {
            String[] listOfNames = registry.list();
            System.out.println("Client: list of names bound in registry:");
            if (listOfNames.length != 0) {
                for (String s : registry.list()) {
                    System.out.println(s);
                }
            } else {
                System.out.println("Client: list of names bound in registry is empty");
            }
        } catch (RemoteException ex) {
            System.out.println("Client: Cannot show list of names bound in registry");
            System.out.println("Client: RemoteException: " + ex.getMessage());
        }
    }

    private IEffectenBeurs bindEffectenbeursUsingRegistry() {
        IEffectenBeurs effectenbeurs1 = null;
        try {
            Object object = registry.lookup(bindingName);
            effectenbeurs1 = (IEffectenBeurs) registry.lookup(bindingName);
        } catch (RemoteException ex) {
            System.out.println("Client: Cannot bind Effectenbeurs");
            System.out.println("Client: RemoteException: " + ex.getMessage());
            effectenbeurs1 = null;
        } catch (NotBoundException ex) {
            System.out.println("Client: Cannot bind Effectenbeurs");
            System.out.println("Client: NotBoundException: " + ex.getMessage());
            effectenbeurs1 = null;
        }
        return effectenbeurs1;
    }

    private Registry locateRegistry(String ipAddress, int portNumber) {
        Registry registry = null;
        try {
            registry = LocateRegistry.getRegistry(ipAddress, portNumber);
        } catch (RemoteException ex) {
            System.out.println("Client: Cannot locate registry");
            System.out.println("Client: RemoteException: " + ex.getMessage());
            registry = null;
        }
        return registry;
    }

    private IEffectenBeurs bindEffectenbeursUsingNaming(String ipAddress, int portNumber) {
        IEffectenBeurs Effectenbeurs = null;
        try {
            Effectenbeurs = (IEffectenBeurs) Naming.lookup("rmi://" + ipAddress + ":" + portNumber + "/" + bindingName);
        } catch (MalformedURLException ex) {
            System.out.println("Client: Cannot bind Effectenbeurs");
            System.out.println("Client: MalformedURLException: " + ex.getMessage());
            Effectenbeurs = null;
        } catch (RemoteException ex) {
            System.out.println("Client: Cannot bind Effectenbeurs");
            System.out.println("Client: RemoteException: " + ex.getMessage());
            Effectenbeurs = null;
        } catch (NotBoundException ex) {
            System.out.println("Client: Cannot bind Effectenbeurs");
            System.out.println("Client: NotBoundException: " + ex.getMessage());
            Effectenbeurs = null;
        }
        return Effectenbeurs;
    }

    public static void main(String[] args) {
        if (locateRegistry) {
            System.out.println("CLIENT USING LOCATE REGISTRY");
        } else {
            System.out.println("CLIENT USING NAMING");
        }

//        // Get ip address of server
        Scanner input = new Scanner(System.in);
        System.out.print("Client: Enter IP address of server: ");
        String ipAddress = input.nextLine();

        // Get port number
        System.out.print("Client: Enter port number: ");
        int portNumber = input.nextInt();
        // Create client
        BannerController client = new BannerController(ipAddress, portNumber);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {

    }
}

我非常怀疑第三课与这个问题有什么关系，但以防万一：我把它包括在内。

AEXBanner：包客户端;

import java.rmi.RemoteException;
import javafx.animation.AnimationTimer;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class AEXBanner extends Application {

    public static final int WIDTH = 1000;
    public static final int HEIGHT = 100;
    public static final int NANO_TICKS = 20000000;
    // FRAME_RATE = 1000000000/NANO_TICKS = 50;

    private Text text;
    private double textLength;
    private double textPosition;
    private BannerController controller;

    private AnimationTimer animationTimer;
    private Timeline timeline;
    private int TIMERTICK = 200;
    private int frame = 0;
    private String koersen;

    public void setController(BannerController banner) {
        //controller = banner(this);
    }
    @Override
    public void start(Stage primaryStage) {

        Font font = new Font("Arial", HEIGHT);
        text = new Text();
        //controller = new BannerController(this);

        text.setFont(font);
        text.setFill(Color.BLACK);

        Pane root = new Pane();
        root.getChildren().add(text);
        Scene scene = new Scene(root, WIDTH, HEIGHT);

        primaryStage.setTitle("AEX banner");
        primaryStage.setScene(scene);
        primaryStage.show();
        primaryStage.toFront();

        timeline = new Timeline();
        timeline.setCycleCount(Timeline.INDEFINITE);
        timeline.setAutoReverse(false);

        // Start animation: text moves from right to left
        animationTimer = new AnimationTimer() {
            private long prevUpdate;

            @Override
            public void handle(long now) {
                long lag = now - prevUpdate;
                if (lag >= NANO_TICKS) {
                    // calculate new location of text
                    // TODO
                    if (textPosition < 0 - textLength) {
                        textPosition = WIDTH;
                    }
                    textPosition -= 5;

                    text.relocate(textPosition, 0);
                    prevUpdate = now;
                }
            }

            @Override
            public void start() {
                prevUpdate = System.nanoTime();
                textPosition = WIDTH;
                text.relocate(textPosition, 0);
                //setKoersen("Nothing to display");
                super.start();
            }
        };
        animationTimer.start();
    }

    public void setKoersen(String koersen) {

        text.setText(koersen);

        textLength = text.getLayoutBounds().getWidth();
    }
}

总结我的问题（只是为了说清楚）：当RMI服务器运行时，我需要用StartClient启动这个项目。 StartClient启动BannerController。我希望能够直接使用BannerController类启动程序。

非常感谢任何提示或可能的解决方案！

编辑：在Lasagna建议更改后，当我启动BannerController时会出现此错误：

Exception in Application constructor
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Unable to construct Application instance: class client.BannerController
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:907)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoSuchMethodException: client.BannerController.<init>()
    at java.lang.Class.getConstructor0(Class.java:3082)
    at java.lang.Class.getConstructor(Class.java:1825)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:818)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    ... 1 more
Exception running application client.BannerController
D:\Dropbox\HBO ICT\Leerjaar 2\GSO3\AEXBanner Week 1\nbproject\build-impl.xml:1051: The following error occurred while executing this line:
D:\Dropbox\HBO ICT\Leerjaar 2\GSO3\AEXBanner Week 1\nbproject\build-impl.xml:805: Java returned: 1
BUILD FAILED (total time: 0 seconds)

Answer 1

让我们来看看你的错误。

sun.launcher.LauncherHelper $ FXHelper.main（LauncherHelper.java:767）引起：java.lang.IllegalStateException：不在FX应用程序线程上; currentThread = main

这就是说你没有＆＃34; FX应用程序线程＆＃34;并且您当前的主题是＆＃34;主要。＆＃34;

这是因为您尝试使用main方法作为主要方法＆＃34;但是在FX中，它并没有像那样工作（时髦啊？））。 main只是一种启动FX应用程序本身的方法，这就是你得到这个错误的原因。

应用程序的启动方法就是发生的事情。

在你的第一堂课＆＃34; StartClient＆＃34;你使用＆＃34; BannerController＆＃34;的主要部分。然后在你的主要人物中{＆＃34; launch(args)＆＃34;这就是你推出外汇申请的方式。

在你的横幅应用程序中，你有一个包含大量内容的主类，但没有launch(args)

我也不确定为什么＆＃34;开始＆＃34;抛出一个没有代码的异常。

所以你需要做的是

从主类除外的所有类中删除应用程序。
确保主要课程中的主要课程有"launch(args)"。
确保主要课程覆盖＆＃34;开始＆＃34;方法，并且你＆＃34;启动＆＃34;你的代码来自那里。

所以拿这个代码

public static void main(String[] args) {
        if (locateRegistry) {
            System.out.println("CLIENT USING LOCATE REGISTRY");
        } else {
            System.out.println("CLIENT USING NAMING");
        }

//        // Get ip address of server
        Scanner input = new Scanner(System.in);
        System.out.print("Client: Enter IP address of server: ");
        String ipAddress = input.nextLine();

        // Get port number
        System.out.print("Client: Enter port number: ");
        int portNumber = input.nextInt();
        // Create client
        BannerController client = new BannerController(ipAddress, portNumber);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {

    }

并将其更改为

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

    @Override
    public void start(Stage primaryStage) throws Exception {
 if (locateRegistry) {
            System.out.println("CLIENT USING LOCATE REGISTRY");
        } else {
            System.out.println("CLIENT USING NAMING");
        }

//        // Get ip address of server
        Scanner input = new Scanner(System.in);
        System.out.print("Client: Enter IP address of server: ");
        String ipAddress = input.nextLine();

        // Get port number
        System.out.print("Client: Enter port number: ");
        int portNumber = input.nextInt();
        // Create client
        BannerController client = new BannerController(ipAddress, portNumber);
    }

更改JavaFX应用程序开始表单

1 个答案: