I have a ListView in my application and I want to sort the entries. I also want the list to automatically sort if a new entry is added.
For this, I use a SortedList. The Java API says "All changes in the ObservableList are propagated immediately to the SortedList.".
When I run my code below, the output of the command line is exactly what I expect. But the ListView is not sorted.
How can I do this? Thanks!
public class Test extends Application
{
public static final ObservableList names = FXCollections.observableArrayList();
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
final ListView listView = new ListView(names);
listView.setPrefSize(200, 250);
listView.setEditable(true);
names.addAll("Brenda", "Adam", "Williams", "Zach", "Connie", "Donny", "Lynne", "Rose", "Tony", "Derek");
listView.setItems(names);
SortedList<String> sortedList = new SortedList(names);
sortedList.setComparator(new Comparator<String>(){
@Override
public int compare(String arg0, String arg1) {
return arg0.compareToIgnoreCase(arg1);
}
});
for(String s : sortedList)
System.out.println(s);
System.out.println();
names.add("Foo");
System.out.println("'Foo' added");
for(String s : sortedList)
System.out.println(s);
StackPane root = new StackPane();
root.getChildren().add(listView);
primaryStage.setScene(new Scene(root, 200, 250));
primaryStage.show();
}
}
Command line output:
Adam
Brenda
Connie
Derek
Donny
Lynne
Rose
Tony
Williams
Zach
'Foo' added
Adam
Brenda
Connie
Derek
Donny
Foo <--
Lynne
Rose
Tony
Williams
Zach
You need to use the SortedList
in the ListView
. I.e. do
final ListView listView = new ListView();
listView.setPrefSize(200, 250);
listView.setEditable(true);
names.addAll("Brenda", "Adam", "Williams", "Zach", "Connie", "Donny", "Lynne", "Rose", "Tony", "Derek");
SortedList<String> sortedList = new SortedList(names);
listView.setItems(sortedList);