Developing a JavaFX Hello World Application: Coding Examples In this topic, we transform the sample application created by IntelliJ IDEA into a very basic JavaFX Hello World application. In this way, we show basic coding assistance features provided by the IDE.
A simple Hello World application. Begin by creating a simple 'Hello World' console application. Follow these steps: Launch Visual Studio 2017. Select File > New > Project from the menu bar. In the New Project* dialog, select the Visual C# node followed by the.NET Core node. Then select the Console App (.NET Core) project template.
(The sample application is created by IntelliJ IDEA automatically when you create a project for your JavaFX application development from scratch, see.) • • • • • Renaming the Controller class To adjust the sample application to your needs, you may want to start by renaming the files. To see how, let's perform the Rename refactoring for the class Controller. We'll rename this class to SampleController. You can use a different name if you like. • In the editor, place the cursor within the class name and select Refactor| Rename (alternatively, press Shift+F6). • Place the cursor in front of Controller and type Sample. • Press Enter to indicate that you have completed the refactoring.
Now, switch to sample.fxml in the editor and note that the value of the GridPanel fx:controller attribute has changed to 'sample.SampleController'. (Initially it was 'sample.Controller'.) In a similar way you can change the names of other files if necessary. Developing the user interface To show you how IntelliJ IDEA can help you write your code, let's implement a kind of Hello World JavaFX application. In the user interface (UI), we'll define a button which when clicked will display the text Hello World! To do that, we'll add the following two elements between the opening and closing tags in the file sample.fxml.
We suggest that you do everything by typing to see how code completion works. • Go to the end of the opening tag and press Enter to start a new line. SetText ( 'Hello World!'
); At this step, the code of the application is ready. Let's run the application to see the result. Running the application • To run the application, click on the toolbar or press Shift+F10.
The application window now contains the Say 'Hello World' button. • Click this button to see that the text Hello World! • Close the application window. Styling the UI with CSS To complete the coding examples, let's change the appearance of the UI by adding a Style Sheet and defining a couple of formatting styles in it. • In the file sample.fxml, add a reference to a (non-existing) CSS file sample.css.
One way to do that is to add the stylesheets attribute within the opening tag, e.g.
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