I am trying to get my JavaFX program to run but am having some difficulty. I keep getting an error of ‘java.lang.NullPointerException: Location is required.’ The fxml file is in the same package as Application class. Here is my very simple code: And here is a copy of my main.fxml file: The control…
Copy image from JavaFX application and paste it using Windows
I am working on a JavaFX application. I want to copy image from application using context menu and paste it using Windows feature of paste. For example, like shown below in images. And want to paste at location from using of Windows features menu. Answer Use the Clipboard and ClipboardContent, e.g. as: For th…
Collect successive pairs from a stream
Given a stream such as { 0, 1, 2, 3, 4 }, how can I most elegantly transform it into given form: { new Pair(0, 1), new Pair(1, 2), new Pair(2, 3), new Pair(3, 4) } (assuming, of course, I’ve defined class Pair)? Edit: This isn’t strictly about ints or primitive streams. The answer should be genera…
Resolve a dependency on package sun.misc with Tycho
I try to convert a Buckminster-based build to Tycho (0.19.0). In our (mirrored) target platform we have the bundle com.lmax.disruptor from http://lmax-exchange.github.io/disruptor/ which imports the package “sun.misc” When I try to build our own bundle (that depends on com.lmax.disruptor) I get: […
Android: OutOfMemory error and the backstack
the following sheet represents the working flow in the application this question is about. I ran into problems with OutOfMemory Errors, mostly because users were able to switch from activity B to activity D multiple times (They are showing different content for every attempt), without the previous activity be…
How to add multiple JComponents to a JPanel?
I’m trying to add multiple components to a JPanel, but only the most recently added component is displaying. It seems like the problem is that the layout can only handle 1 component at a time, but I’m at a loss as to how to actually fix it. I’ve tried adding the components to a separate pane…
String pattern which starts with # @ and can contain underscore and minus
I try to make a string pattern that can contain UTF-8 characters (öäå, etc) and match the following criteria in Java (1.7); Must start with # or @ Must be lower-case Can contain – or _ (minus and …
Unable to load jdbc driver eclipse
I get the following error while trying to load MySQL Driver: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java….
How can I read a file containing text and image data?
I’ve got a file with the following structure: For example: I write the example above like this: This works fine. However, I do not know how to read the file. The problem is that I need to call ImageIO.read() to parse the image, but I can’t call it with a BufferedReader. My draft looks like this: S…
Creating a Java Enum in Scala
My workplace has been experimenting in moving from Java to Scala for some tasks, and it works well for what we’re doing. However, some preexisting logging methods expect a java.lang.Enum. The logging method is defined in the (Java) base class, and the subclasses can define their own enums, which the log…