结束Swing应用程序时出现JavaFX错误

Question

I have a Swing application in which I need to display internally generated HTML/CSS. In order to do this, I have adapted the code from this StackOverflow question .

The control works fine. However, when the application ends, I receive the error

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f9622171ae8, pid=5782, tid=140283095549696

For what it's worth, the sample code directly from Oracle (quoted in the StackOverflow post) has the same problem.

I have tried explicitly calling Platform.exit() when the window closes, but the error remains. So, how does one shut down JavaFX correctly, when it is embedded in a Swing application?

Answer 1

Ok, I found the solution, at least for this application:

• This is a multi-window application; the JavaFX component is not in the main application window, but in a sub-window.

• The JavaFX "Platform" has a setting "ImplicitExit", which is by default "true".

• JavaFX Platform.exit() is apparently called both when the sub-window is closed, and when the main application is closed. This second call (when the application is closed) generates the error message described in the original question.

• The "implicit exit" behavior is in any case undesirable, because it prevents the sub-window from being re-opened a second time during the application's lifetime.

Hence, the solution is to turn off "implicit exit". Here's the JavaFX initialization code in the subwindow:

Platform.runLater(new Runnable() {
    @Override public void run() {
        view = new WebView();
        engine = view.getEngine();
        jfxPanel.setScene(new Scene(view));
        Platform.setImplicitExit(false); // Otherwise cannot open report window a second time
    }
});