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我得到的InvocationTargetException當我嘗試從控制器(JavaFX的)調用一個方法,將代碼放在如下:的InvocationTargetException調用控制器方法時 - JavaFX的
public void start(Stage stage) throws Exception {
URL location = getClass().getResource("startScreen.fxml");
FXMLLoader loader = new FXMLLoader();
loader.setLocation(location);
loader.setBuilderFactory(new JavaFXBuilderFactory());
//Getting hte controller
StartScreenController s = (StartScreenController)loader.getController();
//Where error occurs
s.setParent(this);
Parent root = (Parent) loader.load(location.openStream());
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
它正常工作時,我刪除了「 setParent「行。
這似乎已經爲其他人(盡我所知,當試圖自己解決這個問題)。
任何幫助,將不勝感激,謝謝。
我得到的錯誤(s.setParent是38行)
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.javafx.main.Main.launchApp(Main.java:642)
at com.javafx.main.Main.main(Main.java:805)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:403)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at johnsoft.dndcommunication.DndCommunication.start(DndCommunication.java:38)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:206)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:173)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
... 1 more
Java Result: 1
您似乎試圖調用內部控制主類的東西,看到這個鏈接http://stackoverflow.com/questions/14059954/calling-view-method-in-controller/14063918#14063918 – invariant 2013-02-09 22:22:34
有InvocationTargetException的根本原因?如果是,哪一個? – 2013-02-10 00:22:53
我會發布整個錯誤消息,儘管它在發生錯誤的註釋中說。 – 2013-02-10 11:18:35