How to convert ObjectProperty<date> to ObjectProperty<localdate>

Question

I want to bind

dp_date_add.valueProperty().bindBidirectional(model.forDateProperty());

where forDateProperty() is:

public ObjectProperty<Date> forDateProperty() {
        if(forDate == null){
            forDate = new SimpleObjectProperty<>();
        }
        return forDate;
    }

The problem is bindBiderectional accpets only LocalDate. I've tried this:

dp_date_add.valueProperty().bindBidirectional(model.forDateProperty().get().toInstant().atZone(ZoneId.systemDefault()).toLocalDate());

But it doesn't works, because it convert to LocalDate, not to Property LocalDate.

Answer 1

如果可以，解决此问题的简便方法是更改​​模型，使其使用ObjectProperty<LocalDate>。假设你不能这样做，你需要使用两个听众：

dp_date_add.valueProperty().addListener((obs, oldDate, newDate) -> 
    model.forDateProperty().set(Date.from(newDate.atStartOfDay(ZoneId.systemDefault()).toInstant())));

model.forDateProperty().addListener((obs, oldDate, newDate) -> 
    dp_date_add.setValue(model.forDateProperty().get().toInstant().atZone(ZoneId.systemDefault()).toLocalDate()));