我当前的项目是带有RMI的JavaFX应用程序 . 目前我有两个三个 class ，我想减少到两个 class ，但我无法知道如何 .
这三个类：StartClient.java BannerController.java AEXBanner.java
代码和错误消息：
sun.reflect.DeativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.invoke：62）at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）的sun.reflect.NativeMethodAccessorImpl.invoke0（本地方法）中的java.lang.reflect.InvocationTargetException 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）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）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）at javafx.stage.Stage . （Stage.java:241）at javafx.stage.Stage . （Stage.java:227）at client.BannerController . （BannerController.java:71）at client.BannerController.main（BannerController.java:174）... 11更多异常运行应用程序client.BannerController D：\ Dropbox \ HBO ICT \ Leerjaar 2 \ GSO3 \ AEXBanner第1周\ nbproject \ build-impl.xml：1051：执行此行时发生以下错误：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启动程序时（RMI服务器正在运行）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服务器工作正常，所以不必担心 .
这三个类可以在下面找到：
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 {
}
}
我非常怀疑第三类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();
}
}
所以最后我的问题（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 .
任何提示或可能的解决方案将不胜感激！
编辑：在Lasagna建议更改之后，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)
1 回答
让我们来看看你的错误 .
这就是说你没有“FX应用程序线程”，你当前的线程是“主要的” .
这是因为你试图使用main方法作为你的“主要方法”，但在FX中，它不能像那样工作（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 .
在您的第一个 class "StartClient"中，您使用"BannerController"的主要部分，然后在您的主要部分中使用“
launch(args)”，这就是您启动FX应用程序的方式 .在您的 Banner 应用程序中，您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“start”会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 .
确保主类在main方法中有
"launch(args)".确保主类重写"start"方法，并确保从那里"launch"您的代码 .
所以拿这个代码
并将其更改为