How to creat a button programmatically with JavaFX?

Question

I want to make a button on an AnchorPane without drag it from the library in the FXML file I want to do it progammatically: if the search button clicked, should show a new button not existed in the AnchorPane before I did this code but I don't know what is wrong with it:

private void searchButton(ActionEvent evt) { Button tab = new Button(); tab.setLayoutX(147); tab.setLayoutY(102); tab.setText("Tab1"); tab.setPrefHeight(27); tab.setPrefWidth(69); WebView wb = new WebView(); wb.setLayoutX(-1); wb.setLayoutY(128); wb.setPrefWidth(1604); wb.setPrefWidth(700); }

Not without more information. Where do you want the button to appear? — James_D
– James_D, Commented Apr 29, 2015 at 21:20
So please show the code from the FXML file where the anchor pane is defined, and the code in the controller where it is injected. — James_D
– James_D, Commented Apr 29, 2015 at 21:47

jewelsea · Accepted Answer · 2015-04-30 00:59:47Z

I am assuming that you searchButton method is in controller attached to some FXML. Then all you need to do is this:

yourAnchorPane.getChildren().add(tab);

If you don't have already published reference to anchorPane in your controller, then add this into your controller

@FXML AnchorPane yourAnchorPane;

And in SceneBuilder select your anchorPane, go to code tab and enter "yourAnchorPane" as fx:id.

Further info on working with anchorpane is javadoc.

You probably also want to set some constraints on the tab to locate it at a position within the AnchorPane. For instance, the following code will locate your button tab relative to the top left corner of the AnchorPane: Ten pixels down and fifteen pixels to the right.

AnchorPane.setTopAnchor(tab, 10.0); AnchorPane.setLeftAnchor(tab, 15.0);

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