JAVA FX - Create observableHashMap inside fxml - javafx

Question

How can I write hashMap inside an fxml. I tried like this, but my IDE doesn't recognize the "entry" tag name. This must create a Map<String, Integer>
<FXCollections fx:factory="observableHashMap">
<entry>
<String fx:value="Vandaag" />
<Integer fx:value="1"/>
</entry>
<entry>
<String fx:value="Deze week" />
<Integer fx:value="7"/>
</entry>
<entry>
<String fx:value="Deze maand" />
<Integer fx:value="31"/>
</entry>
</FXCollections>

Answer 1

Defining as
<FXCollections fx:factory="observableHashMap">
<foo>123</foo>
<bar>456</bar>
</FXCollections>
works. However you loose the type safety and may not able to define a space separated key like
<kung foo>123</kung foo>
So defining the map in controller seems more appropriate.

Answer 2

There isn't much about maps in the introduction to FXML. However, you can do something like this: (in fxml)
<Group fx:id="mapWrapper">
<properties Vandaag="1" Deze_week="7" Deze_maand="31" />
</Group>
Then in your controller class you can have:
#FXML
private Group mapWrapper;
private ObservableMap map;
public void initialize() {
// the properties object is backed up by observable hash map
map = mapWrapper.getProperties();
// do something with the map
map.forEach((key, value) -> System.out.println(key + ":" + value));
}
prints the following:
Deze_maand:31
Vandaag:1
Deze_week:7
It probably isn't exactly what you wanted but it works