I am trying to get a button to print out Java is fun after being clicked and I keep getting a Cannot find symbol error when I run it. I'm not sure whether it is my import statements or an actual error in the code itself. I was wondering if someone could help me figure out why I'm getting the error?
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
public class ButtonHandler extends Application {
#Override // Override the start method in the Application class
public void start(Stage primaryStage) {
Pane pane = new Pane();
Button btOK = new Button("OK");
pane.getChildren().add(btOK);
btOK.setOnAction((ActionEvent e) -> {
System.out.println("Java is Fun");
});
// Create a scene and place it in the stage
Scene scene = new Scene(Pane);
primaryStage.setTitle("Button Demo"); // Set title
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage
}
public static void main(String[] args) {
launch(args);
}
}
Related
I was trying to learn JavaFX and used the code on this video: https://www.youtube.com/watch?v=FLkOX4Eez6o.
I have Google it but could not find a solution.
Then Eclipse IDE shows this error:
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Testes extends Application{
Button botao;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Controle de processos");
botao = new Button();
botao.setText("+");
StackPane layout = new StackPane();
layout.getChildren().add(botao);
Scene cena = new Scene(layout, 300, 250);
primaryStage.setScene(cena);
primaryStage.show();
}
}
I am trying to create a program to teach people about GNU/Linux and the command line, I have my main.java
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
Stage window;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
window = primaryStage;
Parent root = FXMLLoader.load(getClass().getResource("login.fxml"));
primaryStage.setTitle("Learnix");
primaryStage.setScene(new Scene(root, 800, 500));
primaryStage.show();
}
}
And the controller to go with it.
package sample;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import java.io.IOException;
public class loginController {
public Button loginBtn;
public void loginBtnClick() throws IOException {
System.out.println("You are logged in");
}
}
I have tried things such as:
FXMLLoader.load(getClass().getResource("lessons.fxml"));
But I can't figure out how to get it to swap scenes. I have seen many tutorials on YouTube and it Stack Overflow but many of them have all of the JavaFX on the main.java and not in separate files as I am using scenebuilder.
Thank you.
You can either call Stage.setScene() to change the whole scene or just substitute a root to the new one by Scene.setRoot():
Parent newRoot = FXMLLoader.load(getClass().getResource("lessons.fxml"));
primaryStage.getScene().setRoot(newRoot);
I was testing the MonologFX from JFXtras (v8.0-r5), but I got stuck with it!
Can anyone tell me how to check what was the button in the dialog that was pressed by the user? I tried in many ways, but no luck at all.
package javafx_jfxtras_monologfx;
import javafx.application.Application;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;
import jfxtras.labs.dialogs.MonologFX;
import jfxtras.labs.dialogs.MonologFXButton;
import jfxtras.labs.dialogs.MonologFX.Type;
public class JavaFX_JFXtras_MonologFX extends Application
{
#Override
public void start(Stage stage)
{
MonologFX m = new MonologFX();
m.setModal(true);
m.setType(Type.QUESTION);
m.setTitleText("JFXtras MonologFX");
m.setMessage("Do you want to continue?");
m.setPos(698, 450);
MonologFXButton mb1 = new MonologFXButton();
mb1.setType(MonologFXButton.Type.YES);
mb1.setLabel("Continue");
m.addButton(mb1);
MonologFXButton mb2 = new MonologFXButton();
mb2.setType(MonologFXButton.Type.NO);
mb2.setLabel("Exit");
m.addButton(mb2);
Button btn = new Button();
btn.setText("Click the Button");
btn.setOnAction(new EventHandler<ActionEvent>()
{
#Override
public void handle(ActionEvent event)
{
System.out.println("Hello :)");
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
stage.setTitle("JavaFX - JFXtras MonologFX");
stage.setScene(scene);
stage.show();
m.show();
}
public static void main(String[] args)
{
launch(args);
}
}
But the controls in labs are experimental and Mark has not worked on this one for a long time. We don't take them out because someone may use them, but as of version 8u40 JavaFX has a dialog itself. https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Dialog.html|
so maybe I'm not using the method how it's intended to be used but a video I watched by youtube user thenewboston used it exactly like this and it worked just fine. Help would be appreciated
package checkers;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.FlowLayout;
import javafx.scene.Scene ;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.application.*;
import javafx.stage.*;
public class Checkers extends Application {
Stage window;
public void start(Stage primaryStage) throws Exception {
window = primaryStage;
window.setTitle("Title");
HBox layout = new HBox();
Button startButton = new Button("Start");
Button quitButton = new Button("Quit");
layout.getChildren().addAll(startButton, quitButton);
Scene startScene = new Scene(layout, 400, 300);
window.setScene(startScene);
window.show();
}
public static void main(String[] args) {
launch(args);
}
}
`
The error I am receiving is as follows -
"The method addAll(int, Collection) in the type List is not applicable for the arguments (Button, Button)"
You imported the wrong type of Button. You want import javafx.scene.control.Button; not import java.awt.Button;
I was wondering how to make the caret visible and/or flash whilst using a TextField or TextArea. The ones I have created in my GUI work as the letters appear when typed but there is no visible caret.
I've looked through the TextField documentation but none are about making it visible or not. I expected to find something along the lines "setCaretVisible(Boolean);"
Do I have to make it visible via CSS? If so, any suggestions would be most welcome!
Please see code that I've quickly put together to illustrate the problem:
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.event.ActionEvent;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCombination;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class Test extends Application {
public static void main(String[] arguments) { launch(arguments); }
#Override public void start(Stage stage) {
Scene scene = new Scene(new Group());
scene.setRoot(new BuildLayout(stage));
stage.setTitle("Application Name");
stage.setScene(scene);
stage.initStyle(StageStyle.UNDECORATED);
stage.initStyle(StageStyle.TRANSPARENT);
stage.setFullScreen(true);
stage.setFullScreenExitHint("");
stage.setFullScreenExitKeyCombination(KeyCombination.NO_MATCH);
stage.show();
}
}
final class BuildLayout extends BorderPane {
protected BuildLayout(Stage stage) {
TabPane tabpane = new TabPane();
Tab tab = new Tab();
tab.setGraphic(new Text("Video Browser"));
tab.setClosable(false);
tab.setContent(new Input(1));
tabpane.getTabs().addAll(tab);
setTop(new Toolbar(stage));
setCenter(tabpane);
}
}
final class Input extends VBox {
Input(int id) {
HBox hbox = new HBox();
TextField videoTitle = new TextField("video_title");
TextArea description = new TextArea( "video_description");
Button share = new Button("share");
Button unshare = new Button("unshare");
setPadding(new Insets(5,10,10,5));
setAlignment(Pos.TOP_CENTER);
hbox.getChildren().addAll(videoTitle, new Text(" Creator: " + " Date: " + " Views: " + " "));
if(true) {
videoTitle.setEditable(true);
description.setEditable(true);
if(true) {
hbox.getChildren().add(share);
} else { hbox.getChildren().add(unshare); }
}
getChildren().addAll(hbox, description);
}
}
final class Toolbar extends HBox {
protected Toolbar(Stage stage) {
Button close = new Button("close");
close.setOnAction((ActionEvent e) -> { stage.close(); });
setAlignment(Pos.CENTER_LEFT);
getChildren().addAll(close);
}
}
Many thanks,
This problem only occurs on Mac and not Windows (untested Linux). The fix is to downgrade to a JavaFX 2.2 compliant maximised window as the setMaximized() from JavaFX 8 also isn't Mac compatible.
Modifying the start method with some code found here:
#Override public void start(Stage stage) {
Scene scene = new Scene(new Group());
scene.setRoot(new BuildLayout(stage));
Screen screen = Screen.getPrimary();
Rectangle2D bounds = screen.getVisualBounds();
stage.setTitle("Application Name");
stage.setScene(scene);
stage.setX(bounds.getMinX());
stage.setY(bounds.getMinY());
stage.setWidth(bounds.getWidth());
stage.setHeight(bounds.getHeight());
stage.show();
}
Produces a fullscreen application with visible and flashing caret.