JavaFX - 如何将IntegerProperty绑定到LongProperty并解除绑定

import javafx.beans.property.IntegerProperty;
import javafx.beans.property.LongProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleLongProperty;

public class Main {
    public static void main(String[] args) {
        IntegerProperty i = new SimpleIntegerProperty(null, "i", 1024);
        LongProperty l = new SimpleLongProperty(null, "l", 0L);

        System.out.println("i.get() = " + i.get());
        System.out.println("l.get() = " + l.get());

        l.bind(i);

        i.set(2048);

        System.out.println("i.get() = " + i.get());
        System.out.println("l.get() = " + l.get());

        l.unbind();
        System.out.println("Unbound l to i, f to l, d to f.");

        i.bind(l);
        System.out.println("Bound f to d, l to f, i to l.");

        System.out.println("Calling d.set(10000000000L).");
        i.set(100);

        System.out.println("l.get() = " + l.get());
        System.out.println("i.get() = " + i.get());
    }
}