[FIXED] JavaFX TableView Integer not displaying while String items are

Issue

I have a program with these columns:

showNameColumn.setCellValueFactory(new PropertyValueFactory<Show, String>("ShowName"));
epsWatchedColumn.setCellValueFactory(new PropertyValueFactory<Show, Integer>("EpsWatched;"));
showStatusColumn.setCellValueFactory(new PropertyValueFactory<Show, String>("ShowStatus"));

The getters are called getShowName(), getEpsWatched(), and getShowStatus() which get the variables showName, epsWatched, and showStatus.

What's wrong here? The strings display but not the ints.

Solution

You have a “;” in the string passed to the property value factory, it should not be there.

This is wrong:

new PropertyValueFactory<Show, Integer>("EpsWatched;")

PropertyValueFactory lookup strings and property names should follow Java bean naming conventions. For more info, see:

• Javafx PropertyValueFactory not populating Tableview

Normally, I’d close the question as a duplicate of the above question, however, the asker requested a specific answer and had some additional questions, so this answer addresses those directly.

It is recommended to use a lambda rather than a PropertyValueFactory, as any errors will be detected and reported accurately by the compiler rather than failures at runtime. For a thorough analysis, see:

• Java: setCellValuefactory; Lambda vs. PropertyValueFactory; advantages/disadvantages

how would I write a lamba for this?

In your model class declare the property and provide an accessor for it:

public class Show {
    private final IntegerProperty numEpisodes = new SimpleIntegerProperty();
    public final IntegerProperty numEpisodesProperty() {
        return numEpisodes;
    }
}

Use the property accessor in a lambda to define the cell value factory:

TableColumn<Show, Integer> numEpisodesCol = new TableColumn<>();
numEpisodesCol.setCellValueFactory(
    data -> data.getValue().numEpisodesProperty().asObject()
);

See also:

• Converting Integer to ObservableValue<Integer> in javafx

Answered By - jewelsea
Answer Checked By - Marilyn (JavaFixing Volunteer)