There's no need for that null check since while it's true the initial value for the selected property is null, the moment the listener is triggered is when an item is selected, therefore now it has a value, so it's never going to be null.
The root won't be null, it exists, but root.getValue() would be null (it has no String value) so the if should be "if (newValue.getValue() != null)" in that case
Hello, I learned a lot from this playlist and I want to ask if you give permission to me to create the same tutorial based on your tutorial in my language or not.
Ok, 3 years after the fact, but this is knowledge to carry with you for the rest of your life :-) .... Ginger root! Slice up a chunk about an inch or so long, boil it in water for "a while", sweeten it up with honey. It's good for what ails ya.
I really hope you can Help me. I create a Programm and I use a directory Chooser and (I want) to use a treeview to display the direcotries and their Input in A treeview. To create a Treeview with your own items is one thing. But how i can connect my diretorychooser with a tree view. I wrote the DirectoryChooser and the Path will be written in the Textbox, but HOW (?) will the last part of the Part or directory used and shown in the Treeview? damn i Hope you could understand my Problem in some points )=
I have a question. In your example when you start app treeView, branch is selected I mean Bucky is selected( blue color). I copy your example "bit by bit " .... :) and on my computer after compile app, I haven't seen any selected branch. Why? I have only blue frame on Bucky branch.
I've solved my problem, I used - tree.getSelectionModel().selectFirst(); - and then Bucky node in the Tree has highlighted. Your examples are very useful. thx
Bucky I am sorry b ut I am haVinG problems with just starting out using JavaFX on IntelliJ Idea! I am mainly not getting it rigjt with setting the correct Project path. can u pls help me with this?
does anybody have resources to creating listeners like here but without lambdas? i think it is a very poor idea to teach something the "easy way" without showing exactly what is actually happening.
Listeners take an EventHandler as a parameter. Eventhandler.java is annotated as a functional interface, which means that it is an interface with only one method. So, when you pass an EventHandler instance as the parameter, you are really just defining which of the handle methods you want the item to use. Because that is the only purpose of the parameter, using a lambda expression just lets you pass the handle method itself as a parameter without the overhead of making an entire class for the purpose of passing it as a parameter. That isn't the "easy way", it was specifically designed to be used that way. If you insist, you can pass any class as a parameter as long as that class implements EventHandler.java, but that only makes sense if you expect a lot of items to use the same handle method, which is probably bad design anyway.
![เป็นไปได้ไหม - WanMai [Official MV]](http://i.ytimg.com/vi/_6lZ6b3_7Vo/mqdefault.jpg)
Bucky you are teaching me my entire bachelors degree as far as coding goes. Who needs time with teachers when I have TH-cam.
You kinda saved me, i always fall asleep reading tutorial code out there.
@13:33 Why was Bucky selected by default? I can't see where that happened in the code.
Use : tree.getSelectionModel().select(0);
(0 is the index of the element in your tree, if you put 1 you will have selected by default "thenewboston")
"Alright guys" is the first thing he says in every video :D
He called me a hoss once. I took great offense.
There's no need for that null check since while it's true the initial value for the selected property is null, the moment the listener is triggered is when an item is selected, therefore now it has a value, so it's never going to be null.
if he sets setShowRoot(true) , then the selected property i.e if he selects root then the value will be null
The root won't be null, it exists, but root.getValue() would be null (it has no String value) so the if should be "if (newValue.getValue() != null)" in that case
Hello, I learned a lot from this playlist and I want to ask if you give permission to me to create the same tutorial based on your tutorial in my language or not.
Ok, 3 years after the fact, but this is knowledge to carry with you for the rest of your life :-) .... Ginger root! Slice up a chunk about an inch or so long, boil it in water for "a while", sweeten it up with honey. It's good for what ails ya.
So how can I find the source codes on your github page
THANKS MAN!
3:21 root.setExpanded(true); I think this method no longer exists now please help
nevermind my mistake!
I really hope you can Help me.
I create a Programm and I use a directory Chooser and (I want) to use a treeview to display the direcotries and their Input in A treeview. To create a Treeview with your own items is one thing. But how i can connect my diretorychooser with a tree view.
I wrote the DirectoryChooser and the Path will be written in the Textbox, but HOW (?) will the last part of the Part or directory used and shown in the Treeview?
damn i Hope you could understand my Problem in some points )=
Hi need help
I want to drag and drop treeitem just like as in scene builder. Have explored almost all tutorial but no got success.
How do we set lambda events for treeview?Please help🙏🏿🙏🏿🙏🏿
Hi.. Can you please let me know how to search or filter "treeitem" in "treeview" in "textfield keyreleased event" using javafx application.
Can we resize the Treeitem to certain height , width ?
I have a question. In your example when you start app treeView, branch is selected I mean Bucky is selected( blue color). I copy your example "bit by bit " .... :) and on my computer after compile app, I haven't seen any selected branch. Why? I have only blue frame on Bucky branch.
You didnt bit by bit else it would work. Maybe check where you said to select it and move it maybr
I've solved my problem, I used - tree.getSelectionModel().selectFirst(); - and then Bucky node in the Tree has highlighted. Your examples are very useful. thx
Sebastian Sporek k cool
@@sebastiansporek3891 It is selected but value of it is not printed when program starts. How to solve it?
Does anyone know how to get the tree input using the button???
awesome videos!
Bucky I am sorry b ut I am haVinG problems with just starting out using JavaFX on IntelliJ Idea! I am mainly not getting it rigjt with setting the correct Project path. can u pls help me with this?
did you get it working?
When i Click on the Treeitems i get this as an ouput: TreeItem [ value: youtube ] for instance. Does someone know why?
Its newValue.getValue() dumbass
ty dude
@@florent9555 did this man just respond to himself
Because when you declared TreeView you've forgotten . Your delcare is TreeView tree, but correct is TreeView tree;
Does anyone have code for this tutorial?
setExpanded hits **Undefiend reference
Bucky is this your real name? I Guess its Greg. Pls Reply
shashwat khanna i think it is. Bucky Roberts
Shashwat Khanna itis Greg, and you did know that, stop trying to act smart lol
does anybody have resources to creating listeners like here but without lambdas? i think it is a very poor idea to teach something the "easy way" without showing exactly what is actually happening.
Listeners take an EventHandler as a parameter. Eventhandler.java is annotated as a functional interface, which means that it is an interface with only one method. So, when you pass an EventHandler instance as the parameter, you are really just defining which of the handle methods you want the item to use. Because that is the only purpose of the parameter, using a lambda expression just lets you pass the handle method itself as a parameter without the overhead of making an entire class for the purpose of passing it as a parameter. That isn't the "easy way", it was specifically designed to be used that way. If you insist, you can pass any class as a parameter as long as that class implements EventHandler.java, but that only makes sense if you expect a lot of items to use the same handle method, which is probably bad design anyway.
1st
Great videos but could you please say SSSSSSTrings in place of saying SHHHHHHHtrings? Thanks :)
omg u r so weird. 14:29