Is it possible to parse BigDecimal from a textfield ? I have seen some code where they parse bigdecimal from strings. But is it also possible to use this on textfield. I have worked out some code to make it work. But i have no idea if i should do it this way.
Float price = Float.parseFloat(textFieldInvoiceServicePrice.getText());
String servicetext = textFieldInvoiceService.getText();
BigDecimal priceExcl= BigDecimal.valueOf(price);
No, that's not how you should do it - you're currently parsing from a string to float, then converting that float to a BigDecimal. You clearly know how to get a string from a text field, because you're already doing it in the first line - you can just do that with BigDecimal instead:
BigDecimal price = new BigDecimal(textFieldInvoiceServicePrice.getText());
However, you should note that this won't be culture-sensitive - it will always use . as the decimal separator, for example. You should use NumberFormat if you want culture-sensitive parsing.
Here's an example with a property, a textfield and a converter:
public class MoneyParser extends Application {
ObjectProperty<BigDecimal> money = new SimpleObjectProperty<BigDecimal>();
@Override
public void start(Stage primaryStage) {
Group root = new Group();
TextField textField = new TextField();
// bind to textfield
Bindings.bindBidirectional(textField.textProperty(), moneyProperty(), new MoneyStringConverter());
// logging
money.addListener((ChangeListener<Number>) (observable, oldValue, newValue) -> System.out.println("Money: " + newValue));
root.getChildren().addAll(textField);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
public class MoneyStringConverter extends StringConverter<BigDecimal> {
DecimalFormat formatter;
public MoneyStringConverter() {
formatter = new DecimalFormat("0.0", new DecimalFormatSymbols(Locale.US));
formatter.setParseBigDecimal(true);
}
@Override
public String toString(BigDecimal value) {
// default
if( value == null)
return "0";
return formatter.format( (BigDecimal) value);
}
@Override
public BigDecimal fromString(String text) {
// default
if (text == null || text.isEmpty())
return new BigDecimal( 0);
try {
return (BigDecimal) formatter.parse( text);
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
}
public final ObjectProperty<BigDecimal> moneyProperty() {
return this.money;
}
public final java.math.BigDecimal getMoney() {
return this.moneyProperty().get();
}
public final void setMoney(final java.math.BigDecimal money) {
this.moneyProperty().set(money);
}
}
