JavaFX how to combine more EventHandlers in one re

问题:

I am making registration form in JavaFX. And i have button to submit entered data, which works perfectly. But i also want to allow user to submit data when user press enter ?

Is there any way to combine in one if statement if button is pressed or enter is pressed ?

I know i can make it separately but then i need to double my code.

回答1:

You have to listen to key press events and button press events separately, there is no way to handle these two events with a single listener: the button press will fire an ActionEvent and the key press will file a KeyEvent.

But, if you create a method to make the "data submission" and you simply call this method in the two listeners, you can avoid code duplication.

submitButton.setOnAction(new EventHandler<ActionEvent>() {

    @Override
    public void handle(ActionEvent event) {
        submitData();
    }
});

scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
    @Override
    public void handle(KeyEvent ke) {
        switch (ke.getCode()) {
            case ENTER:
                submitData();
                break;
            default:
                break;
        }
 }});

Or the same in a short form using lambdas:

submitButton.setOnAction(event -> submitData());
scene.setOnKeyPressed(keyEvent -> {
    if(keyEvent.getCode().equals(KeyCode.ENTER))
        submitData();
});