public class TableColumn<S, T>

A TableView is made up of a number of TableColumn instances. Each TableColumn in a table is responsible for displaying (and editing) the contents of that column. As well as being responsible for displaying and editing data for a single column, a TableColumn also contains the necessary properties to:

• Be resized (using minWidth/prefWidth/maxWidth and width properties)
• Have its visibility toggled
• Display header text
• Display any nested columns it may contain
• Have a context menu when the user right-clicks the column header area
• Have the contents of the table be sorted (using comparator, sortable and sortType)

When creating a TableColumn instance, perhaps the two most important properties to set are the column text (what to show in the column header area), and the column cell value factory (which is used to populate individual cells in the column). This can be achieved using some variation on the following code:

 
 ObservableList<Person> data = ...
 TableView<Person> tableView = new TableView<Person>(data);

 TableColumn<Person,String> firstNameCol = new TableColumn<Person,String>("First Name");
 firstNameCol.setCellValueFactory(new Callback<CellDataFeatures<Person, String>, ObservableValue<String>>() {
     public ObservableValue<String> call(CellDataFeatures<Person, String> p) {
         // p.getValue() returns the Person instance for a particular TableView row
         return p.getValue().firstNameProperty();
     
  });
 }
 tableView.getColumns().add(firstNameCol);}

This approach assumes that the object returned from p.getValue() has a JavaFX ObservableValue that can simply be returned. The benefit of this is that the TableView will internally create bindings to ensure that, should the returned ObservableValue change, the cell contents will be automatically refreshed.

In situations where a TableColumn must interact with classes created before JavaFX, or that generally do not wish to use JavaFX apis for properties, it is possible to wrap the returned value in a ReadOnlyObjectWrapper instance. For example:

 
 firstNameCol.setCellValueFactory(new Callback<CellDataFeatures<Person, String>, ObservableValue<String>>() {
     public ObservableValue<String> call(CellDataFeatures<Person, String> p) {
         return new ReadOnlyObjectWrapper(p.getValue().getFirstName());
     
  });}

It is hoped that over time there will be convenience cell value factories developed and made available to developers. As of the JavaFX 2.0 release, there is one such convenience class: PropertyValueFactory. This class removes the need to write the code above, instead relying on reflection to look up a given property from a String. Refer to the PropertyValueFactory class documentation for more information on how to use this with a TableColumn. Finally, for more detail on how to use TableColumn, there is further documentation in the TableView class documentation.

extends TableColumnBase<S, T> implements EventTarget

Parameters:

<S>		The type of the TableView generic type (i.e. S == TableView<S>)
<T>		The type of the content in all cells in this TableColumn.

See also:
TableView, TableCell, TablePosition

Since:  JavaFX 2.0