JavaFX communication between controllers 📣

[@BroCodez]

//-----------------------------------------Main.java-------------------------------------------- package application; import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.stage.Stage; import javafx.scene.Parent; import javafx.scene.Scene; public class Main extends Application { @Override public void start(Stage stage) { try { Parent root = FXMLLoader.load(getClass().getResource("Scene1.fxml")); Scene scene = new Scene(root); stage.setScene(scene); stage.show(); } catch(Exception e) { e.printStackTrace(); } } public static void main(String[] args) { launch(args); } } //-----------------------------------------Scene1.fxml----------------------------------------- //-----------------------------------------Scene2.fxml----------------------------------------- //----------------------------------Scene1Controller.java----------------------------------- package application; import java.io.IOException; import javafx.event.ActionEvent; import javafx.fxml.FXML; import javafx.fxml.FXMLLoader; import javafx.scene.Node; import javafx.scene.Parent; import javafx.scene.Scene; import javafx.scene.control.TextField; import javafx.stage.Stage; public class Scene1Controller { @FXML TextField nameTextField; private Stage stage; private Scene scene; private Parent root; public void login(ActionEvent event) throws IOException { String username = nameTextField.getText(); FXMLLoader loader = new FXMLLoader(getClass().getResource("Scene2.fxml")); root = loader.load(); Scene2Controller scene2Controller = loader.getController(); scene2Controller.displayName(username); //root = FXMLLoader.load(getClass().getResource("Scene2.fxml")); stage = (Stage)((Node)event.getSource()).getScene().getWindow(); scene = new Scene(root); stage.setScene(scene); stage.show(); } } //----------------------------------Scene2Controller.java----------------------------------- package application; import javafx.fxml.FXML; import javafx.scene.control.Label; public class Scene2Controller { @FXML Label nameLabel; public void displayName(String username) { nameLabel.setText("Hello: " + username); } } //--------------------------------------------------------------------------------------------------

[@tuV13ja]

Can you make a video about good practices/design patterns for data validation from UI and comunication with business logic ???? I've never seen a video about it, so you can be the chosen one for this job :')

[@اماديرأمان]

We need more javafx videos ,you do the job very simple and easy to understand thanks professor

[@devguyahnaf]

I was just searching for some Java tutorials and this channel has the best one. I am a fellow bro now :D

[@اماديرأمان]

It's true ,it brings me a lot Just fellow lessons

[@amorfati4559]

This is so much simpler than how my professor demonstrated. Thanks bro

[@JefffMocha]

If you get an error when clicking the Login button, make sure that your Scene2.fxml document has Scene2Controller as its controller.

[@saleemf340]

this comment saved me

[@markstockan6333]

I had this issue too and I had neglected to do this so maybe it was omitted in the video or I missed it but got it working finally after a lot of head scratching.

[@mytestaccount23]

Really easy to follow and informative videos about JavaFX. Thanks for making these videos

[@lequangnghi194]

I don't know why I run into a NullPointerException at this line of code: scene2Controller.displayName(userName); Edit: Never mind! I just forgot to add Controller class

[@abhisheksahu6421]

i am getting error can you share what fixed yours

[@lequangnghi194]

@@abhisheksahu6421 You need to link your Controller in SceneBuilder

[@abhisheksahu6421]

@@lequangnghi194 thanks

[@user-yz5hj3zg2x]

thank you!!

[@singhsachin12345]

i am unable to fix it can you tell me the clear solution

[@okdai2020]

One of the clearest lesson on youtube!!!

[@konstandinosdimitriou2301]

Once again your video saved me from missing a deadline in uni ! bro code your my favorite programing teacher

[@TheGreat8220]

This is the best Java channel I've found so far!

[@Rumen35]

I wish i found this video a month ago. Keep up the good work bro

[@edwardesqueda4759]

Love all your videos! There aren’t enough JAVAFX videos up!

[@stephenkyanda8311]

easy and simple to follow, even one can unders tand step without voice noted embeded

[@Stebandisousa]

Thanks dude, you're a god, best tutorials ever, like and recommend!

[@kvsw6296]

Amazing tutorial! Thank you very much for this video

[@gerdsfargen6687]

You saved my coding skin! Thank you so much, man!

[@HeluAcademyXBrainBoosters]

I am a fellow bro ....Yes boss

[@minduin90]

Thanks bro! This tips is very helpful to me

[@katt2478]

hey please! how can I just get the data in the same way but to more than just one controller??? like i wanna get that same data from scene 1 to scene 2 , scene 3, and scene 4 ??? please help !!

[@amir_edlbi]

You saved me. Thanks a lot.

[@brandonjablasone7544]

Bro you are really the goat

[@sanskarsongara2592]

From today, I'm a fellow bro :-)

[@mohamadghobadi5043]

Excellent Useful Thank you very much

[@umarqazi9113]

Best one out there!

[@mohamadghobadi5043]

Please be the next media player tutorial (audio and video) I will only learn from your channel

[@wolanus]

Great video!

[@tesseractentertainmentnetw2570]

Hello! Hoping for some help, I'm having issues getting an ClassCastException with the Scene2Controller scene2controller = loader.getcontroller(); piece, the only thing i'm doing differently is using a package, could that be effecting how this should work?

[@CRASH4R]

Bro, i watch this video now and i have the same problem. If actuality: "Scene2.fxml" have , u should change

[@socaljusticewarrior558]

I hate JavaFX. I would much rather work with Swing. It's baffling that I have to create a class, create an XML file(excuse me, an "FXML" file) for the class to load, then specify in the FXML file that I want to have these methods and objects. It's super redundant, but it's easier to update and modify than the Swing GUIs, so I guess employers like it for that reason.

[@اماديرأمان]

What about if I want to update a method in differnt controller from another controller

[@KaraSuraDraw1]

Heey, im not sure if you can respond as quickly as possible, but how do you pass boolean values of Radio Buttons to another controller? I want to do something if a certain Radio Button is clicked.

[@igorsantanas]

Thanks Bro, that helps a lot!

[@MrPlaybook]

Bro adamdır!

[@TheGalactusDiet]

Love it.

[@ashkanshakiba9579]

Useful 👌👍

[@arshahin9803]

awesome!

[@tuV13ja]

You explain so well dude! And you even go directly to the point, thanks for making my time worth :D good job sub++ from Argentina :p

[@15bigchina]

Thanks for sharing this video , it's really helpful. Only one question that my scene1 login button can't link to login action. no drop-down available and if I type "login" manually show javafx.fxml.LoadException: No controller specified

[@valitx8129]

You need to choose the Controller class from the left bottom section, below the Hierarchy, called Controller. Then you will see the drop-down menu and the variables to link.

[@vincentparkes2513]

Nice🙂

[@Mars-sm]

Thank you, bro!

[@kimevar]

Nice video

[@MrsAhmed-lr1sp]

nice show()

[@MrDritzii]

love you bro

[@silvergodanalyser7762]

Hey Mate thanks for the vid! Can you link your Eclipse theme? I have already a black one, but yours look better and the overlay (HUD) with the projects are also black and not (like now) only the main window with the code.

[@JavaMoth]

Omg finally was able to shut down that executor from the controller file on app exit

[@Not_Yukii]

Thanks you so much !

[@chemso_1]

da best

[@tharinmahale9878]

Thanks this helped me alot

[@shahzaibmalik9264]

thanks bro

[@tttttroll]

But how can you do this with a label and not passing information through a text box?

[@csubh]

for some reason it shows Node cannot be resolved to a type in the main controller class

[@longkesh1971]

Thanks bro.

[@deividimizael]

Thanks, I Love you

[@الاءالاحمدي-غ1ز]

How can I use Javafx to drawing line by using dda algorithm.¿

[@berriahzaki7827]

plz help me i have this problem class com.example.demo1.Nouvauxlocataire cannot be cast to class javafx.scene.Parent

[@Arxa93]

Thank you

Thanks.

[@mcfrizzlefries5537]

Hell yeah, thanks bro code

[@hamzachiguer642]

thank you bro

[@yassiressaid3140]

can you do a java dao toturial with practical example

[@BroCodez]

not a bad idea!

[@NagaVenkateshgavini]

good :)

[@AI-lf7fl]

I'm a faaaan of yours

[@Dswilsonangel]

Thanks!!!!!!!!!😁

[@ICantCodeYet]

I love Bro Code

[@Verzach3]

KZbin doesn't notify this video to me :c

[@Stella_8008]

Does not work for me i get a big error Nvm Got it to work :D (btw your tutorials are so fun and good to watch thank you!)

[@ut5671]

i got an exception ...whenever i clicked login...i used the same code..can u help me out plz

[@augischadiegils.5109]

Tnx bro

[@teamwang4968]

I have a question lets say i wanna let the user put his first name and his last name so I change the scene2Controller to: public void displayerName (String username, String theLastName){ nameLabel.setText("hello:"+username +" "+ theLastName); } and the scene1Contoller to a: theHelloSceneController.displayerName(username , theLastName); with of course adding String theLastName = userlastName.getText(); put it doesn't log in and move to the Scene2 what should i do please help

[@berriahzaki7827]

class com.example.demo1.Nouvauxlocataire cannot be cast to class javafx.scene.Parent

[@aliwissam9672]

Do you use discord?

[@BroCodez]

I do for personal use, but I don't have a server set up for this channel

[@ahmedmouad344]

i dont really know why everyone uses fxml instead of Java it self to build things this is not the only course that does this and i wanna learn java not xml ..:(

[@cinnamonshake45]

then use Scene builder... using java to build is a really tedious process, and becomes unmanageable if youre seriously developing an application

[@srinicnu5283]

i want the src code plz its urgent

[@hananetahrat6820]

It not work

[@inhtrongthang3367]

Please kotlin

[@amadoutraore1967]

Thank you bro