How to populate TableView with String Arraylist in

I want to populate TableView with String, String I have only two columns. I couldn't do it. What I tried so far is:

ObservableList<String> data = FXCollections.observableArrayList();
for (blabla){
data.addAll(Id,Name);
}
tableView.getItems().addAll(data);

and nothing shows on table. But when I do tableView.getItems() and print it, I see the data I've added. But on table, nothing is shown.

I create my columns as follows:

TableColumn idColumn = new TableColumn("Id");

TableColumn nameColumn = new TableColumn("Name");

I see some examples on the internet in which an object is created to populate the TableView but I don't want to create a class just for a table view. Is there any other possible ways to accomplish this?

Edit:

I just want to have something like:

ObservableList<String,String> data = FXCollections.observableArrayList(); 

for(int i = 1; i<blabla i++){
data.add((i)+"S",myList.get(i));
}

First, you have to create your table'c columns in the FXML file or from code. After, you have to create cell value factory which will generate your columns with your data.

For example:

@FXML
private TableView<String> tableView;

@FXML
private TableColumn<String, String> columnOne;

@FXML
private TableColumn<String, String> columnTwo;

columnOne.setCellValueFactory(c -> new SimpleStringProperty(new String("123")));

columnTwo.setCellValueFactory(c -> new SimpleStringProperty(new String("456")));

Without FXML:

private TableView<String> table = new TableView<String>();

TableColumn columnOne = new TableColumn("One");
TableColumn columnTwo = new TableColumn("Two");

table.getColumns().addAll(columnOne, columnTwo);

columnOne.setCellValueFactory(c -> new SimpleStringProperty(new String("123")));
columnTwo.setCellValueFactory(c -> new SimpleStringProperty(new String("456")));

table.getItems().addAll("Column one's data", "Column two's data");