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Java Build a JavaFX Application Graphical User Interfaces Getting Started

Ego Team
Ego Team
17,902 Points

Please help! I get a runtime error. it seems like it doesn't like the Text node.

Here is my code!

package sample;

import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.scene.Group; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.VBox; import javafx.scene.text.Text; import javafx.stage.Stage;

public class Main extends Application {

@Override
public void start(Stage primaryStage) throws Exception{
    //Parent proot = FXMLLoader.load(getClass().getResource("sample.fxml"));

    Group root = new Group();
    Text text = new Text("Sup?");
    root.getChildren().add(text);
    primaryStage.setTitle("Sup");
    primaryStage.setScene(new Scene(root, 300, 275));
    primaryStage.show();
}


public static void main(String[] args) {

    launch(args);
}

}

And here is the error message i am getting.

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: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:745) Caused by: java.lang.NullPointerException at com.sun.t2k.MacFontFinder.initPSFontNameToPathMap(MacFontFinder.java:339) at com.sun.t2k.MacFontFinder.getFontNamesOfFontFamily(MacFontFinder.java:390) at com.sun.t2k.T2KFontFactory.getFontResource(T2KFontFactory.java:233) at com.sun.t2k.LogicalFont.getSlot0Resource(LogicalFont.java:184) at com.sun.t2k.LogicalFont.getSlotResource(LogicalFont.java:228) at com.sun.t2k.CompositeStrike.getStrikeSlot(CompositeStrike.java:86) at com.sun.t2k.CompositeStrike.getMetrics(CompositeStrike.java:132) at com.sun.javafx.font.PrismFontUtils.getFontMetrics(PrismFontUtils.java:31) at com.sun.javafx.font.PrismFontLoader.getFontMetrics(PrismFontLoader.java:466) at javafx.scene.text.Text.<init>(Text.java:153) at javafx.scene.text.Text.<init>(Text.java:162) at sample.Main.start(Main.java:24) at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319) at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:219) at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:182) at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:179) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)

Process finished with exit code 1

Please help!!!

2 Answers

Seth Kroger
Seth Kroger
56,413 Points

I did a little research on this and it looks like this is a bug specific to the Mac and Java 7 JDK. It's supposed to be fixed in the latest version of OpenJDK 7 (u95 or higher, the Oracle JDK ended public updates for 7), so I'd suggest updating your Java installation to that or a Java 8 SDK.

Bug details: https://bugs.openjdk.java.net/browse/JDK-8143907

For anyone that still may be experiencing this issue and doesn't want to update to SDK 8, stackoverflow offered an acceptable workaround. In the main method add the following:

   try {
            Class<?> macFontFinderClass = Class.forName("com.sun.t2k.MacFontFinder");
            Field psNameToPathMap = macFontFinderClass.getDeclaredField("psNameToPathMap");
            psNameToPathMap.setAccessible(true);
            psNameToPathMap.set(null, new HashMap<String, String>());
        } catch (Exception e) {
        }