Check out example codes for "javafx action event enter key". It will help you in understanding the concepts better.

Code Example 1

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.KeyCode;

btn.setOnKeyPressed(new EventHandler<KeyEvent>() {
        @Override
        public void handle(KeyEvent k) {
            if (k.getCode().equals(KeyCode.ENTER)) {
                doSomething();
            }
        }
});

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