Caused by: java.lang.NullPointerException: Location is required.

朱雀 2022-07-15 06:47 140阅读 0赞

运行javaFX程序报错，错误信息如下：

Exception in Application start method  
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method  
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)  
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)  
at java.lang.Thread.run(Thread.java:745)  
Caused by: java.lang.NullPointerException: Location is required.  
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)  
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)  
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)  
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)  
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)  
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)  
at com.wzj.javafx.Main.start(Main.java:15)  
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)  
at com.sun.javafx.application.PlatformImpl.lambda$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  
  
  
Process finished with exit code 1

解决办法：

将

>     Parent root = FXMLLoader.load(getClass().getResource("xml/MainUI.fxml"));

改为：

>     Parent root = FXMLLoader.load(getClass().getClassLoader().getResource("xml/MainUI.fxml"));