How can I get the contents of a JavaFX TableColumn?

Question

If I have a TableView in JavaFX with some TableColumn's is there a way I can get the data in that column's cells?

TableColumn concentrationCol = new TableColumn("Initial Concentration");
    concentrationCol.setMinWidth(150);
    concentrationCol.setCellValueFactory(
            new PropertyValueFactory<SpeciesDoubleWrapper, String>("d"));
    concentrationCol.setCellFactory(TextFieldTableCell.forTableColumn());
    concentrationCol.setOnEditCommit(
            new EventHandler<TableColumn.CellEditEvent<SpeciesDoubleWrapper, String>>() {
                @Override
                public void handle(TableColumn.CellEditEvent<SpeciesDoubleWrapper, String> t) {
                    ((SpeciesDoubleWrapper) t.getTableView().getItems().get(
                            t.getTablePosition().getRow())
                    ).setD(t.getNewValue());
                }
            }
    );

This is the code I use to create my TableColumn. I know there is a function getCellObservableValue(int i) which returns the contents of the ith cell, but when I use it I get ObjectProperty [value: 0.0] returned instead of 0.0 , which is the value of the cell.

Answer 1

You are getting a Property , and more precisely an ObjectProperty .

These classes are used for the concept of data binding . To make it short, data binding allows JavaFX to keep track of the values if they change and automatically update the view accordingly.

To get the value, just call get() .

Answer 2

You can call getValue method of extended class ObjectExpression :

getCellObservableValue(0).getValue()

https://docs.oracle.com/javase/8/javafx/api/javafx/beans/binding/ObjectExpression.html#getValue--