What is not an equivalent of the handler below when written in Lambda notation? btn.setOnAction (new EventHandler () { @Override public void handle (ActionEvent event) { setFill(Color.GREEN); rec.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Consider the following code. Replace the tags_??1_ and _??2_, respectively, by filling in the text fields below, such that the given code snippet registers an event handler for
a given Scene (called scene) that, whenever the mouse enters the scene, simply prints the type and position of the corresponding mouse event on the console.
EventHandler<MouseEvent> mouseHandler = new ??1_<MouseEvent> () { // replace_??1__
@Override
public void _??2_(MouseEvent myEvent) {
// replace _??2__
System.out.println (myEvent.getEventType() + " : " + myEvent.getX() + ":" + myEvent.getY());
}};
scene.setOnMouseEntered (mouseHandler);
_??1_: type your answer...
_??2_: type your answer...
Transcribed Image Text:Consider the following code. Replace the tags_??1_ and _??2_, respectively, by filling in the text fields below, such that the given code snippet registers an event handler for a given Scene (called scene) that, whenever the mouse enters the scene, simply prints the type and position of the corresponding mouse event on the console. EventHandler<MouseEvent> mouseHandler = new ??1_<MouseEvent> () { // replace_??1__ @Override public void _??2_(MouseEvent myEvent) { // replace _??2__ System.out.println (myEvent.getEventType() + " : " + myEvent.getX() + ":" + myEvent.getY()); }}; scene.setOnMouseEntered (mouseHandler); _??1_: type your answer... _??2_: type your answer...
What is not an equivalent of the handler below when written in Lambda notation?
btn.setOnAction (new EventHandler<ActionEvent> () {
@Override
public void handle (ActionEvent event) {
rec. setFill (Color.GREEN);
}
});
btn.setOnAction(event -> rec. setFill (Color.GREEN));
btn.setOnAction (event -> {
rec. setFill (Color.GREEN);
});
btn.setOnAction (this);
btn.setOnAction ((ActionEvent event) -> {
rec.setFill (Color.GREEN);
});
Transcribed Image Text:What is not an equivalent of the handler below when written in Lambda notation? btn.setOnAction (new EventHandler<ActionEvent> () { @Override public void handle (ActionEvent event) { rec. setFill (Color.GREEN); } }); btn.setOnAction(event -> rec. setFill (Color.GREEN)); btn.setOnAction (event -> { rec. setFill (Color.GREEN); }); btn.setOnAction (this); btn.setOnAction ((ActionEvent event) -> { rec.setFill (Color.GREEN); });
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