JavaFX 应用程序在 Debian 上抛出空指针异常

Question

我正在尝试在 Debian 上启动桌面 java 应用程序。

详情如下：

• Debian Stretch 9.9
• openjdk-8-jdk-headless:amd64 - 8u212-b01-1~deb9u1
• openjfx - 8u141-b14-3~deb9u1

该应用程序以前在其他 PC 上运行正常很长时间。但是在这台机器上，启动我的应用程序后，我看到空窗口（没有控件）和以下异常：

java.lang.NullPointerException
    at com.sun.javafx.sg.prism.RegionImageCache.<init>(RegionImageCache.java:71)
    at com.sun.javafx.sg.prism.NGRegion.getImageCache(NGRegion.java:467)
    at com.sun.javafx.sg.prism.NGRegion.renderBackgroundRectangle(NGRegion.java:811)
    at com.sun.javafx.sg.prism.NGRegion.renderAsRectangle(NGRegion.java:751)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:572)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2053)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:235)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:576)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2053)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:235)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:576)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2053)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
    at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:477)
    at com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:330)
    at com.sun.javafx.tk.quantum.UploadingPainter.run(UploadingPainter.java:134)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
    at java.lang.Thread.run(Thread.java:748)

有没有办法解决这个问题？

附言。部分应用代码

Application.launch(FXMainWindow.class);

public class FXMainWindow extends Application  {

    private ArrayList<ToggleButton> components;

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

        stage.setTitle("App");
        BorderPane root = new BorderPane();

        //bottom
        HBox bottom = new HBox();
        root.setBottom(bottom);

        Button btnRefreshAll = new Button("some");
        HBox.setHgrow(btnRefreshAll, Priority.ALWAYS);
        btnRefreshAll.setMaxWidth(Double.MAX_VALUE);
        btnRefreshAll.setOnAction(event-> {
                new EntityStateRefresher(actions, 10, this).start();
        });
        bottom.getChildren().add(btnRefreshAll);

         .....

        Scene scene = new Scene(root, 210, 363);
        stage.setScene(scene);
        stage.show();

    }

Answer 1

安装支持 OpenGL 的视频驱动程序 (i915) 并将nouveau 列入黑名单后，问题解决了。

感谢大家的cmets