I want a function to return an array but I get a compiler error: 'Cannot assign to an array' The code is this:
Private Function función1()
Dim resultado(1) As Integer
resultado = función2(1,1) 'Se produce el error: no se puede asignar a una matriz'
End Function
Private Function función2(Referencia, Cantidad) As Integer()
Dim resultado(1) As Integer
resultado(0) = referencia * 2
resultado(1) = cantidad * 4
función2 = resultado
End Function
I am using access 2007
Through a listener I intend to change the background image of a TitledPanealthough I have not succeeded. When starting the code, the style sheet shows the 'DownArrow.png' but when expanding/collapsing TitledPanethe image the image disappears and nothing is displayed. The images that I use are in the same folder as the code and the style sheet. The code I am using is the following:
titledPane.expandedProperty().addListener((obs, contraído, expandido) -> {
if (expandido) {
titledPane.lookup(".title").setStyle(
"-fx-background-image : url('flechaAbajo.png'); "
);
} else {
titledPane.lookup(".title").setStyle(
"-fx-background-image : url('flechaArriba.png'); "
);
}
});
The style sheet is:
.titled-pane > .title {
-fx-background-image : url('flechaAbajo.png');
-fx-background-repeat: stretch;
-fx-background-position: right;
}
I'm detecting the change of a button group's value with a Listener. If there is nothing selected I put the previous value before the change, but this causes me to call back to ListenerHow can I avoid it?
The code is:
toggleGroup.selectedToggleProperty().addListener(
(ObservableValue<? extends Toggle> arg0, Toggle oldValue, Toggle newValue) -> {
if (toggleGroup.getToggles().indexOf(toggleGroup.getSelectedToggle()) == -1) {
toggleGroup.selectToggle(oldValue); // esto provoca rellamada al Listener
}
}
);
I want to execute a code every time a is updated Slider JavaFXbut only when its slider ( ) is stopped moving thumbwith the mouse. I have tried with the events OnMouseExitedand OnMouseDragReleasedbut none works.
What event do I need to use?
I want to place the selected value of a Slideron top of its thumb:
I have entered the following code:
miSlider.valueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue arg0, Object arg1, Object arg2) {
información.textProperty().setValue(
String.valueOf((int) miSlider.getValue()));
// posiciono la información
información.setPadding(new Insets(0,0,0,
(miSlider.getValue() - miSlider.getMax()) * miSlider.getWidth() /
(miSlider.getMax()-miSlider.getMin()) + miSlider.getWidth() ));
}
});
The Labelinfo is not placed right above the thumb. How do I get the position of the thumb?
I want to calculate age from a date of birth in Date. I have tried with this code which seems to work fine, but is it the most convenient way?
LocalDate hoy = LocalDate.now();
LocalDate nacimiento = usuarioActivo.getFechaNacimiento().toInstant().
atZone(ZoneId.systemDefault()).toLocalDate();
long edad = ChronoUnit.YEARS.between(nacimiento, hoy);
I have a date in Date and I want to pass it to LocalDate:
Date fechaAntigua = new Date();
LocalDate fechaNueva = new LocalDate();
fechaNueva = fechaAntigua ...?
I need to execute an action after a certain time has passed only once. I have tried with the following:
Timeline contador = new Timeline(new KeyFrame(
Duration.seconds(4),
acción -> System.out.println("acción acontecida")));
contador.play();
}
It seems to work fine but, I want to know if it is the best way or is there another more recommended way.
I have created a table in a MySQL database that stores a text field:
CREATE TABLE `Usuarios` (
`Id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`Nombre` varchar(50) DEFAULT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
I have entered 2 names: José and José
And from Java I do a search query that tells me that I have two equal records:
ResultSet resultado = consulta.executeQuery("SELECT COUNT(*) FROM `Usuarios` WHERE UPPER(`Nombre`) = ‘JOSÉ’";
resultado.first();
System.out.println("Usuarios llamados JOSÉ: " + resultado.getInt(1));
ANSWER: Users named JOSÉ: 2
How can I prevent it from treating stressed and unstressed vowels the same?
I am trying to store in a MySQL record a value java.util.Datethat contains a date and a time together. I have tried with this:
java.util.Date d = new java.util.Date();
plantilla = new SimpleDateFormat("dd/MM/yyyy H:mm");
String tiempo = plantilla.format(d);
And then record the value in MySQL tiempobut it doesn't work. I don't know if I have to use the java.sql.Date. In any case, I'm lost.
Can I write directly to the raw a value java.util.Datein MySQL defining the field with another type other than DATETIMEor is it not recommended?
What is the best way to reverse a bit of an integer in Java? I have tried the following way although it seems inelegant to me:
int entero = 4+2+1;
if ((entero & 4) == 4)
entero -= 4;
else
entero += 4;
System.out.println ("Entero con el bit 3 invertido: " + entero);
I have a file .fxmlwhere I have defined a control PasswordFieldand an event KeyPressed:
<PasswordField fx:id="clave" onKeyPressed="#teclaPulsada" prefWidth="170.0" />
I want to prevent someone from pasting a copied key and thus force it to be typed. I'm trying the following code to detect the control or command key (depending on whether it's win or mac) but I don't know how to detect the v key (control/command + v) at the same time
@FXML
void teclaPulsada(KeyEvent keyEvent) {
if (keyEvent.getCode() == KeyCode.COMMAND) {
System.out.println("pulsado command");
keyEvent.consume();
if (keyEvent.getText() == "v") {
System.out.println("pulsada la v");
keyEvent.consume();
}
}
}
I want to limit the number of characters a control supports TextFieldand I have tried this method:
public static void fijarTamañoMáximo(final TextField campoTexto, final int tamañoMáximo) {
campoTexto.textProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(final ObservableValue<? extends String> ov, final String valorAnterior, final String valorActual) {
Pattern permitido = Pattern.compile("[A-Za-zÑÇÁÉÍÓÚÀÈÌÒÙÏÜÂÊÎÔÛñçáéíóúàèìòùïüâêîôû]");
Matcher mpermitido = permitido.matcher(valorActual.substring(valorActual.length() - 1));
if (mpermitido.find()) {
if (campoTexto.getText().length() > tamañoMáximo) {
String s = campoTexto.getText().substring(0, tamañoMáximo);
campoTexto.setText(s);
}
} else // caracter no permitido, borrarlo
if (valorActual.length() == 1) {
campoTexto.setText(""); // ¿Por qué sale error?
} else {
campoTexto.setText(valorAnterior);
}
}
});
}
fijarTamañoMáximo(miTextField, 10); // limito a 10 caracteres
I also limit the data type to alphabetic characters. Up to here everything works fine (although I accept suggestions to improve it). The problem is that when the first character is typed as one that is not allowed, for example a number, an error comes out when I put the text of the TextFielda "" with campoTexto.setText("");. The same thing happens if I try to delete the single character from the control and I don't know why.
Is there a way to hide controls in javaFX so that they don't take up space? I have seen that in android it is possible: control.setVisibility(View.GONE);
What comes to mind is this:
control.setVisible(false);
control.setMinSize(0,0);
control.setMaxSize(0,0);
control.setPrefSize(0,0);
but it preserves my space and forces me to restore the original sizes once the controls are visible again.
I want to customize the appearance of a control PopOverin JavaFX. I have a button that when I press it the PopOver. Here is a working example:
package pruebapopover;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.controlsfx.control.PopOver;
public class PruebaPopOver extends Application {
@Override
public void start(Stage primaryStage) {
PopOver popover = new PopOver();
TextField campo = new TextField();
popover.setContentNode(campo);
Button btn = new Button();
btn.setText("Abrir PopOver");
btn.setOnAction((ActionEvent event) -> {
popover.show(btn);
((Parent) popover.getSkin().getNode()).getStylesheets()
.add(getClass().getResource("PopOver.css").toExternalForm());
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
And the PopOver.css:
.popover {
-fx-background-color: rgba(255,0,0, 0.1); /* rojo semitransparente */
}
.popover > .content {
-fx-padding: 10;
-fx-background-color: transparent;
}
The result is:
But what I expected is this:
How do I remove the white background? Why isn't it semi-transparent? How do I paint the arrow red?
I want to access all the nodes that are contained in a TitledPanefor which I do a loop:
for ( Node panel : panelTitulado.getChildren()){
System.out.println ("Nodo: " + panel.toString());
}
This procedure works for containers like VBox but not TitledPanebecause the property does not exist getChildren(). Is there a property that allows access to the content to know all the nodes inside?
I want to use the new controlsFX controls that I have downloaded from the controlsfx-8.40.10 file on the official website and installed it in SceneBuilder although some controls do not appear as thePopOver
I have also downloaded the repository and opened it in netbeans as a new project:
Next I have opened the sub project 'controlsfx' and I have copied the 'Source Packages' to my particular project:
My project is a miniprogram that just displays a controlFX called CustomTextField:
package pruebacontrolsfx;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.controlsfx.control.textfield.CustomTextField;
public class PruebaControlsFX extends Application {
@Override
public void start(Stage primaryStage) {
CustomTextField customField = new CustomTextField();
customField.setPromptText("Introduce texto");
StackPane root = new StackPane();
root.getChildren().add(customField); // genera un error ¿por qué?
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
But when I run it I get an error just when I add the control CustomTextFieldto a containerStackPane
What am I doing wrong?
I want to read the background color of a control from javaFX code and then apply a transparency to it. I have been looking for information but I am not clear. There is no method getBackgroundColor()but if getBackground()although I'm lost, any idea?
How can I make the background of a content ScrollPaneshow what's underneath? With setOpacity()the controls contained in it also become translucent ScrollPaneand what I intend is that it only be the semi-transparent background. I have tried with CSS: - fx-background-color: rgba(100,100,100, 0.5);but the background is still opaque.
Using Java FXIs it possible to place the vertical scroll bar from one scrollPaneto the left?