Can you create an object of IntegerProperty using new IntegerProperty(3)? If not, what is...

Can you create an object of IntegerProperty using new IntegerProperty(3)? If not, what is the correct way to create it? What will the output if line 8 is replaced by d1.bind(d2.multiply(2)) in Listing 1? What will the output if line 8 is replaced by d1.bind(d2.add(2)) in Listing 1?

LISTING 1 BindingDemo.java

1 import javafx.beans.property.DoubleProperty;
2 import javafx.beans.property.SimpleDoubleProperty;
3
4 public class BindingDemo {
5 public static void main(String[] args) {
6 DoubleProperty d1 = new SimpleDoubleProperty(1);
7 DoubleProperty d2 = new SimpleDoubleProperty(2);
8 d1.bind(d2);
9 System.out.println("d1 is " + d1.getValue()
10 + " and d2 is " + d2.getValue());
11 d2.setValue(70.2);
12 System.out.println("d1 is " + d1.getValue()
13 + " and d2 is " + d2.getValue());
14 }
15 }