java.lang.UnsupportedOperationException for removing a row from the javafx tableview

Question

I am trying to delete the selected record from the tableview in javafx. Below is how I am populating the table with the data:

public void setMainApp(MainAppClass         


        

Answer 1

Remove the data from the underlying list, not the filtered/sorted list:

FileModel selectedItem = fileTable.getSelectionModel().getSelectedItem();
if (selectedItem != null) {
    mainApp.getFileData().remove(selectedItem);
}

Answer 2

SortedList and FilteredList inherit the remove method from AbstractList which does not support remove(index). You have to remove the object from the source list (mainApp.getFileData()) As the selected index might not be the correct index in the source list (after filtering), there is a method to get the correct index in the source list

sortedData.getSourceIndexFor(mainApp.getFileData(), selectedIndex);

So you should change your code to

@FXML
private void deleteFile() {
  int selectedIndex = fileTable.getSelectionModel().getSelectedIndex();
  if (selectedIndex >= 0) {
    int sourceIndex = sortedData.getSourceIndexFor(mainApp.getFileData(), selectedIndex);
    mainApp.getFileData().remove(sourceIndex);
  }
}

I have removed the else cause in this example to reduce it to the minimum.