how to make for loop for buttons in easy way? - javafx

Question

As it is my first application in javafx and trying to make a simple calculator. I want to know how I can make this for loop in easy way :
for(int i=1; i<10; i++){
Button bt1 = new Button();
bt1.setText("1");
bt1.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("1");
}
});
i 1;
}
And how to get this buttons in VBox.

Answer 1

I don't know why it takes a lot of time to do that
but as jewels said it should be very quick in doing that, i'm working with javafx since 9 months at work on a computer that is not very performant and, as i understand it, in the calculator you would have 10 buttons for numbers from 0 to 9, i'd code it like this:
VBox vboxForButtons = new VBox();
for(int i=0; i<10; i++){
Button btnNumber = new Button();
btnNumber.setText(String.valueOf(i));
btnNumber.setOnAction((ActionEvent)->{
System.out.println(btnNumber.getText());
});
vboxForButtons.getChildren().add(btnNumber);
}
In alternative to this, for small and slight applications i advice you to use the SceneBuilder tool linking directly the objects that you drag in the window to an FXML event in the code.
I hope this answer will help you.

Answer 2

You can achieve it using the following code.
VBox vbox = new VBox(); //create new VBox instance
vbox.setMinWidth(500); //set minimum width, dont think you'd need this.
for(int i=1; i<10; i++){
Button btn = new Button();
btn.setMinWidth(200);
btn.setMinHeight(50);
btn.setText("Button" + i);
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println(btn.getText()); //Or "1" as in your code
}
});
vbox.getChildren().add(btn); //add button to your VBox
}
root.getChildren().add(vbox); //root of your pane
primaryStage.setScene(scene); //primaryStage is your stage, scene is the current scene
primaryStage.show();
Edit
Reading the comments in your question about performance issue, this will not fix any of it. I have basically written the same code that you've used above, and added VBox creation and adding Button to it, because from the question it sounded like you needed help with creating VBox and adding Buttons to it.