Beim Versuch, einen TTRPG-Würfelwurf zu erstellen, zeigt das Programm keinen Inhalt an, obwohl keine Fehler vorliegen ⇐ Java

[Anonymous]

Ich versuche, mit Java innerhalb einer Java FX-App einen TTRPG-Würfelroller zu erstellen. Bisher habe ich Folgendes: Das Programm überspringt den Try-Block und zeigt nichts auf dem Bildschirm an, die Konsole zeigt keine Fehler an. Können Sie mir helfen? Ich programmiere dies für ein persönliches Projekt. Da ich auch Student bin, weiß ich nicht viel über Programmieren und versuche, KI so weit wie möglich zu vermeiden.

Code: Select all

public class DiceController {

@FXML
Label rollResult, separatedDice;
@FXML
TextField diceNotationField;
@FXML
Button diceRollButton;

public void roll() {
try {

// get text from field
String diceNotation = diceNotationField.getText();

// Use a regex tp detect dice notation
Pattern regex = Pattern.compile("(\\d+)?d(\\d+)(?:([\\+\\*\\/\\-])(\\d+))?");
Matcher m = regex.matcher(diceNotation);

String diceQuantity = "";
String diceSize = "";
String diceSign = "";
String diceModifier = "";

// Call Random to create a random number
Random rand = new Random();

// if the dice quantity is null is set to 1
if (diceQuantity == null || diceQuantity.isEmpty()) {
diceQuantity = "1";
}

// regex matcher check
if (!m.matches()) {
rollResult.setText("Intruduce a valid dice notation");
} else if (m.matches()) {
diceQuantity = m.group(1);
diceSize = m.group(2);

// Create an array to store the result of each dice
int diceResultArray[] = new int[Integer.parseInt(diceQuantity)];

// this variable will generate a random number rolling the dice
int randomResultInDice = 0;

// this variable stores the total result
int total = 0;

for (int i = 0; i < Integer.parseInt(diceQuantity); i++) {
// generates a random number on the dice,
randomResultInDice = rand.nextInt(1, Integer.parseInt(diceSize) + 1);
// stores the separate values of each dice's results in an array
diceResultArray[i] = randomResultInDice;
// sums the result of the separate dice
total += randomResultInDice;
}

// if there's no sign the string stays empty, else, the regex group is
// recognized and the corresponding operation is performed
if (diceSign == null || diceSign.isEmpty() &&  diceModifier == null || diceModifier.isEmpty()) {
diceSign = "";
diceModifier = "";
} else {
diceSign = m.group(3);
diceModifier = m.group(4);

// stores the total result of the dice plus the operation corresponding to the
// modifier
int totalMod = 0;

switch (diceSign) {
case "+":
totalMod = total + Integer.parseInt(diceModifier);
rollResult.setText(String.valueOf(totalMod));
separatedDice.setText(String.valueOf(Arrays.toString(diceResultArray)));
break;
case "-":
totalMod = total - Integer.parseInt(diceModifier);
rollResult.setText(String.valueOf(totalMod));
separatedDice.setText(String.valueOf(Arrays.toString(diceResultArray)));
break;
case "*":
totalMod = total * Integer.parseInt(diceModifier);
rollResult.setText(String.valueOf(totalMod));
separatedDice.setText(String.valueOf(Arrays.toString(diceResultArray)));
break;
case "/":
if (Integer.parseInt(diceModifier) != 0) {
totalMod = total / Integer.parseInt(diceModifier);
rollResult.setText(String.valueOf(totalMod));
separatedDice.setText(String.valueOf(Arrays.toString(diceResultArray)));
} else {
totalMod = total;
rollResult.setText(String.valueOf(total));
}

break;
default:
rollResult.setText(String.valueOf(total));
separatedDice.setText(String.valueOf(Arrays.toString(diceResultArray)));
break;
}
}

}

} catch (Exception e) {
rollResult.setText(e.toString());
System.out.println(e);
}
}
}

FXML-Datei:

Code: Select all

Hauptmethode der Benutzeroberfläche:

Code: Select all

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 {
@Override
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("mainView.fxml"));
Scene scene = new Scene(root);
primaryStage.setTitle("TTRPG Toolbox");
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
launch(args);
}
}

Und Hauptansicht:

Code: Select all