NetBeans bug showing on example code in book "Pro JavaFX 8: A Definitive Guide" initializing objects in FXML file

Question

In Chapter 3 of "Pro JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients", an example illustrating how to specify objects directly in an FXML file generates errors in NetBeans 8.0.2 (I downloaded the code from the book's site and all other examples I tried so far worked).

This FXML snippet:

is supposed to initialize a field discount with the constant TEN_PCT defined in Utilities.java:

package projavafx.fxmlbasicfeatures;

import java.util.ArrayList;
import java.util.List;

public class Utilities {
    public static final Double TEN_PCT = 0.1d;
    public static final Double TWENTY_PCT = 0.2d;
    public static final Double THIRTY_PCT = 0.3d;

    public static List createList() {
        return new ArrayList<>();
    }
}

The tool tip error is "Constant 'TEN_PCT' is not defined for Utilities."

Another error in the same example appears at this point:

with the error "Class 'java.util.HashMap' does not support property 'q1' ", with analogous errors for the other keys.

What is the reason for these errors, and how can they be fixed?

Here's all the files (besides Utilities.java above):

FXMLBasicFeatures.fxml:










    12345 Main St.
    #ff8800

FXMLBasicFeaturesBean.java:

package projavafx.fxmlbasicfeatures;

import javafx.scene.paint.Color;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class FXMLBasicFeaturesBean {
    private String name;
    private String address;
    private boolean flag;
    private int count;
    private Color foreground;
    private Color background;
    private Double price;
    private Double discount;
    private List sizes;
    private Map profits;
    private Long inventory;
    private List products = new ArrayList();
    private Map abbreviations = new HashMap<>();

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public boolean isFlag() {
        return flag;
    }

    public void setFlag(boolean flag) {
        this.flag = flag;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public Color getForeground() {
        return foreground;
    }

    public void setForeground(Color foreground) {
        this.foreground = foreground;
    }

    public Color getBackground() {
        return background;
    }

    public void setBackground(Color background) {
        this.background = background;
    }

    public Double getPrice() {
        return price;
    }

    public void setPrice(Double price) {
        this.price = price;
    }

    public Double getDiscount() {
        return discount;
    }

    public void setDiscount(Double discount) {
        this.discount = discount;
    }

    public List getSizes() {
        return sizes;
    }

    public void setSizes(List sizes) {
        this.sizes = sizes;
    }

    public Map getProfits() {
        return profits;
    }

    public void setProfits(Map profits) {
        this.profits = profits;
    }

    public Long getInventory() {
        return inventory;
    }

    public void setInventory(Long inventory) {
        this.inventory = inventory;
    }

    public List getProducts() {
        return products;
    }

    public Map getAbbreviations() {
        return abbreviations;
    }

    @Override
    public String toString() {
        return "FXMLBasicFeaturesBean{" +
            "name='" + name + '\'' +
            ",
	address='" + address + '\'' +
            ",
	flag=" + flag +
            ",
	count=" + count +
            ",
	foreground=" + foreground +
            ",
	background=" + background +
            ",
	price=" + price +
            ",
	discount=" + discount +
            ",
	sizes=" + sizes +
            ",
	profits=" + profits +
            ",
	inventory=" + inventory +
            ",
	products=" + products +
            ",
	abbreviations=" + abbreviations +
            '}';
    }
}

FXMLBasicFeaturesMain.java:

package projavafx.fxmlbasicfeatures;

import javafx.fxml.FXMLLoader;

import java.io.IOException;

public class FXMLBasicFeaturesMain {
    public static void main(String[] args) throws IOException {
        FXMLBasicFeaturesBean bean = FXMLLoader.load(
            FXMLBasicFeaturesMain.class.getResource(
                "/projavafx/fxmlbasicfeatures/FXMLBasicFeatures.fxml")
        );
        System.out.println("bean = " + bean);
    }
}

Joeri Sykora · Accepted Answer

Both of the errors you see in the NetBeans editor are due to bugs in NetBeans itself. This is only an issue within the NetBeans editor, the FXMLLoader will happily process these statements as you noticed yourself, when running the sample application.

The first error happens because NetBeans doesn't seem to allow constant fields of which the type differs from the enclosing class' type. So the following snippet will work, because the constant Double.POSITIVE_INFINITY is a double itself:

The second error happens because the special use case of maps are simply not supported in the NetBeans editor.

I've already submitted bug reports for these two cases in NetBeans bugzilla.

Constant 'TEN_PCT is not defined for Utilities`: https://netbeans.org/bugzilla/show_bug.cgi?id=252416

Class 'java.util.HashMap' does not support property 'q1': https://netbeans.org/bugzilla/show_bug.cgi?id=252417

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