文件"icon.png“与类位于同一个文件夹中。但是,如果我只使用(新图像(“icon.png”)),那么它会说java.lang.IllegalArgumentException:无效URL:无效URL或资源找不到。但是现在在添加getClass().getResource之后..。我得到了这个错误。这是我的代码:
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
public class Main extends Application {
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("NewFile.fxml"));
Scene scene = new Scene(root);
primaryStage.setResizable(false);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.getIcons().add(new Image(getClass().getResource("icon.png").toExternalForm()));
primaryStage.show();
}
catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}这是一个错误:
java.lang.NullPointerException
at application.Main.start(Main.java:19)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$11(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$9(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(Unknown Source)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)请帮我修一下。提前感谢!
发布于 2017-12-29 13:31:57
NullPointerException错误是由location of your image is not in the proper position引起的,您所指的是不存在的东西,您可以编辑您的文章以显示您的项目结构。
工作应该是那样的!

https://stackoverflow.com/questions/48023034
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