NSEvent中的断言失败？ [英] Assertion failure in NSEvent?

问题描述

感谢您花时间阅读本文。我是JavaFX的新手，在我的编译器中有一个奇怪的错误，我想要一些见解。

thanks for taking the time to read this. I'm fairly new to JavaFX and have a weird error in my compiler that I would like some insight on.

这是错误：

2018-09-13 19:09:36.387 java[8040:660455] unrecognized type is 4294967295
2018-09-13 19:09:36.387 java[8040:660455] *** Assertion failure in -[NSEvent _initWithCGEvent:eventRef:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1652/AppKit.subproj/NSEvent.m:1969

以下是我正在使用的代码：
这是一个名为 applicationSettings 的<.java文件

Here is the code I am working with: This is in a .java file named applicationSettings

public static double lookupUser(String name, String password) throws IOException {
    InputStream inputStream = applicationSettings.class.getResourceAsStream("/files/users.xlsx");
    XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
    XSSFSheet sheet = workbook.getSheetAt(0);
    Integer lastRow = sheet.getPhysicalNumberOfRows();
    int currentRow = 1;

    while(currentRow < lastRow) {
        if(sheet.getRow(currentRow).getCell(0).getStringCellValue().toLowerCase().equals(name.toLowerCase())) {
            if(sheet.getRow(currentRow).getCell(1).getStringCellValue().toLowerCase().equals(password.toLowerCase())) {
                double accessLevel = sheet.getRow(currentRow).getCell(2).getNumericCellValue();
                System.out.println(accessLevel);
                return accessLevel;
            }
        }
        currentRow++;
    }
    return 4.0;
}

}

这是在.java文件中名为 loginScreen

This is in a .java file named loginScreen

EventHandler<ActionEvent> loginClicked = new EventHandler<ActionEvent>() {
        public void handle(ActionEvent event) {
            double userFound =  0.0;
            try {
                userFound = applicationSettings.lookupUser(usernameField.getText(), passwordField.getText());
            } catch (IOException e) {
                e.printStackTrace();
            }//END of Try/Catch
            if(userFound == 1.0) { //1 is Admin Access
                //TODO: Implement Login
                System.out.println("Admin Login");
                errorLabel.setVisible(false);

            }else if(userFound == 2.0){ //2 is Elevated Access
                //TODO: Elevated Access
                System.out.println("Elevated Login");
                errorLabel.setVisible(false);

            }else if(userFound == 3.0){ 
                //TODO: Basic Access
                System.out.println("Basic Login");
                errorLabel.setVisible(false);
            }else{//Show Error
                errorLabel.setVisible(true);
                //TODO: Show Error
            }//End If Statement
        }

    };

我的Excel文件基本上是这样的结构：

My Excel File is basically structured like this:

NAME    PASSWORD    ACCESS LEVEL

所以对于我的登录就像：

So for my login it would be like:

Trey Carey  March3199;  1

除了自动执行一些繁琐的任务之外，它除了教堂以外什么都没做，所以安全性不是问题。

This isn't going anywhere besides by church where it's not really doing anything besides automating some tedious tasks, so security isn't an issue.

另外，无论如何我可以清理其中一些if语句和我的代码一般我会很感激任何提示或帮助！

Also, if there's anyway I can clean up some of these if statements and my code in general I would appreciate any tips or help!

推荐答案

编辑2 13.11.2018：
此错误已在JavaFX 12中正式修复，被移植到JDK8并被批准向后移植到JFX 11.您可以查看错误报告以查找有关它的更多信息。 JDK-8211304 以下是他们所做更改的链接。 openjfx 我个人不确定当前的情况JDK8的许可证情况所以我建议尽可能切换到最新的OpenJDK和OpenJFX。

Edit 2 13.11.2018: This bug has been officially fixed now in JavaFX 12, was backported to JDK8 and approved to be backported to JFX 11. You can have a look at the bug report to find more information about it.JDK-8211304 Here is a link to the changes they've made. openjfx I'm personally not sure about the current license situation of JDK8 so I would advise to switch to the newest OpenJDK and OpenJFX if possible.

嘿，我遇到了同样的问题，我可以不断重现它。我在macOS 10.14上的JavaFX上出现了这个问题。您只需使用按钮打开第二个阶段即可创建应用程序。如果你在第二个阶段调用stage.showAndWait（）（可能与任何持有该线程的东西有关），然后在不同的应用程序之间切换焦点（我只是在我的JavaFX应用程序和Safari之间使用alt-tab），JavaFX应用程序崩溃了。也可在任何IDE中重现。

Hey there I'm experiencing the same issue you have and I can constantly reproduce it. The issue appears for me on JavaFX on macOS 10.14. You can simply create an application with a button that opens a second stage. If you invoke stage.showAndWait() (could be related to anything that holds the thread) on the second stage and then switch focus between different applications (I just alt-tab between my JavaFX app and Safari), the JavaFX Application crashes. Also reproducible in any IDE.

我实际上发现了一个关于OpenJDK / OpenJFX错误跟踪器的错误报告，但目前还没有太多进展。 JDK-8211137 Mac：因未捕获的异常导致JVM崩溃

I actually found a bug report on the OpenJDK/OpenJFX bug tracker but there isn't much going on at the moment. JDK-8211137 Mac: JVM Crash due to uncaught exception

我还没有解决方案，因为我遇到了确定问题的麻烦，但我找到了一个适用于我特定情况的解决方法。

I don't have a solution yet as I'm having troubles pinning down the exact problem but I found a workaround that works in my specific case.

编辑：
如果我正在使用stage.show（）我只会收到错误，但在使用stage.showAndWait（）或其他任何内容时它会进行某种等待循环，应用程序完全崩溃。

If I'm using "stage.show()" I'm only getting the error but when using stage.showAndWait() or anything that does some kind of waiting loop, the application completely crashes.

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