JavaFX cannot close scene by Esc using getAccelerators() [duplicate] - javafx

Question

Im calling a new stage in my program which I like to close on pressing escape. I did this which gives me a NullPointerException:
scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent t) {
KeyCode key = t.getCode();
if (key == KeyCode.ESCAPE){
stage.close();
}
}
});

Answer 1

try this..
scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>
() {
#Override
public void handle(KeyEvent t) {
if(t.getCode()==KeyCode.ESCAPE)
{
System.out.println("click on escape");
Stage sb = (Stage)label.getScene().getWindow();//use any one object
sb.close();
}
}
});

Answer 2

Add the event handler to the stage/window you want to close on ESC.
JavaFX 8 style:
stage.addEventHandler(KeyEvent.KEY_RELEASED, (KeyEvent event) -> {
if (KeyCode.ESCAPE == event.getCode()) {
stage.close();
}
});

Answer 3

why you dont show us more of your code? However, try this:
public class Login extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(final Stage primaryStage) {
primaryStage.setTitle("JavaFX Welcome");
GridPane grid = new GridPane();
grid.setAlignment(Pos.CENTER);
grid.setHgap(10);
grid.setVgap(10);
grid.setPadding(new Insets(25, 25, 25, 25));
Text scenetitle = new Text("Welcome");
scenetitle.setId("welcome-text");
grid.add(scenetitle, 0, 0, 2, 1);
Label userName = new Label("User Name:");
grid.add(userName, 0, 1);
TextField userTextField = new TextField();
grid.add(userTextField, 1, 1);
Label pw = new Label("Password:");
grid.add(pw, 0, 2);
PasswordField pwBox = new PasswordField();
grid.add(pwBox, 1, 2);
Button btn = new Button("Sign in");
HBox hbBtn = new HBox(10);
hbBtn.setAlignment(Pos.BOTTOM_RIGHT);
hbBtn.getChildren().add(btn);
grid.add(hbBtn, 1, 4);
Scene scene = new Scene(grid, 660, 300);
scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
public void handle(KeyEvent ke) {
if (ke.getCode() == KeyCode.ESCAPE) {
System.out.println("Key Pressed: " + ke.getCode());
primaryStage.close();
}
}
});
//primaryStage.setFullScreen(true);
primaryStage.setScene(scene);
primaryStage.show();
}
}
Done.

Answer 4

Hope the imported Eventhandler package is not of JavaFX.
Try using,
import javafx.event.EventHandler;
Note:As the naming convention are same but only the package name differs between swing and JavaFX, Your NetBeans/Eclipse may auto import different packages, so make sure of it.