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Old JavaFX Code Vs FXml Video for JDK 8 is a free tutorial by Tim Buchalka from Java course
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English
ok so continuing on so we talked about
this code that has been automatically generated by IntelliJ
let's start making some changes to it now so first things first let's change
the title but before I do that lets just run it again as a recap you can see it's a
very basic interface their its got hello world at the top so to change title you probably guess how to do that we come back here on to line 14 and change that to Hello JavaFX ...make that change and run it again and
obviously now on the title of the window is now has been changed to Hello
JavaFX but let's make another change lets actually get it to say Welcome to JavaFX within the
window instead of changing the title now there's two ways to go about this we can
use code in the java code itself or we can change the fxml file so I'm gonna show
you both ways but let's change the application so that it doesn't use xml file at all instead will do everything through code and then later on we'll go
back and look at the fxml so first we going to do is we are going to comment out the load on line 13 because we're not gonna be using the same fxml so comment that out then we need to add the
code manually that's going to create this grid pane node and it can be very
useful you to learn how to do this way as well doing it manually and also learning to use the fxml file so what we're going to do is type
in what is the equivalent code to what was in the fxml file so type.... ..... ..... ...... ....and in case your wondering on what am i doing here looking back at the sample fxml file the code I'm typing is effectively the replacement for this
setting the alignment to center the horizontal gap to 10 and vertical
gap to 10 so we're doing that in code here on line 18 to 20 so I've done that manually and
consequently there we've got a route object so the rest there should work
so before we actually make a change putting text in the window we should be
able to run this and get the same result we had when we had the sample.fxml file so if we run that you can see we still got our window so we are now constructing a window creating it without the fxml file and
incidentally I didn't really say what h gap or v gap was you can probably guess it it's the horizontal
gap between columns in the grid that is what h gap is and v gap is the vertical gap
between rows and grids and we set them both to 10 because that what was set in the
sample.fxml for now you could certainly experiment with different values if you wanted
to and the alignment itself determines where the grid will actually sit
within the grid panes width and height and the set alignment so we are using Pos.CENTER which again is the equivalent of that alignment command that used that I showed you earlier from that sample.fxml so now that we got the same basis to what we had before before I commented out the sample.fxml file let's now add to that so what I'm going to do is add some code to add a label so to do that what I'm going to do is come down to here and before the primaryStage.Show I'm gonna start typing the code in their so lets type....noticing that is javafx.scene control and..... .....we are using the javafx.scene as the import...... ...so it seems a bit cumbersome to add but on line 27 that's what we need
to do any time we're adding a control basically to our scene that's the way it actually works
you need to use the root.get children and .add and whenever the name
of the controllers we are adding we need to put that code in before the
primaryStage.show so that it is on screen and then when we run it should actually work so if
we run this now and have a look and see what's happened you we now got Welcome to
JavaFX showing within the window itself so that's good that its has been added
automatically so closing that down let's change it a little bit let's actually
change the color so to do that we're going to come down here and type greeting will do that just
after the definition with declaration on lin