小编fii*_*hok的帖子

假设我有两个属性，并且我想绑定第三个属性以等于它们之间的计算。

在此示例中，我有 aval1和 afactor属性。我希望该result属性与两者的“幂”绑定：result = Math.pow(factor, val1)

以下 MCVE 显示了我当前如何尝试这样做，但它没有正确绑定。

import javafx.beans.binding.Bindings;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;

public class Main {

    private static DoubleProperty val1 = new SimpleDoubleProperty();
    private static DoubleProperty factor = new SimpleDoubleProperty();
    private static DoubleProperty result = new SimpleDoubleProperty();

    public static void main(String[] args) {

        // Set the value to be evaluated
        val1.set(4.0);
        factor.set(2.0);

        // Create the binding to return the result of your calculation
        result.bind(Bindings.createDoubleBinding(() ->
                Math.pow(factor.get(), val1.get()))); …