Adding dynamic columns and rows data to TableView in java fxml

Remove

tableView.getItems().add(csvData);

which adds the entire list of lists to the table view's data list, each time you read a line from the file (so you get n copies of the same list of list of elements in your table's items list),

and add the line

tableView.setItems(csvData);

after the while loop (this tells the table to use the list of lists as its data list).

If you use proper types, instead of raw types (all those warnings your IDE is giving you are there for a reason) then the compiler will catch these errors for you. I.e.:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;

import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;

public class FXMLDocumentController {

    @FXML
    private TableView<ObservableList<String>> tableView;
    String headers[] = null;
    String items[] = null;

    // Employee ee;
    List<String> columns = new ArrayList<String>();
    List<String> rows = new ArrayList<String>();
    ObservableList<ObservableList<String>> csvData = FXCollections.observableArrayList();

    @FXML
    private void initialize() {
        Insert();
    }

    public void Insert() {

        File f = new File(
                "C:\\Users\\admin\\Desktop\\Project\\shipforecast\\Data\\Recieve\\ShipId-1432530905282-1.csv");
        if (f.exists() && !f.isDirectory()) {

            try (
                FileReader fin = new FileReader(f);
                BufferedReader in = new BufferedReader(fin);
            ) {
                String l;
                int i = 0;

                while ((l = in.readLine()) != null) {

                    if (i < 1) {
                        headers = l.split(",");

                        for (String w : headers) {
                            columns.add(w);

                        }
                        for (int ii = 0; ii < columns.size(); ii++) {
                            final int finalIdx = ii;
                            TableColumn<ObservableList<String>, String> column = new TableColumn<>(columns.get(ii));

                            // column.setText("hghjghjg");
                            column.setCellValueFactory(
                                    param -> new ReadOnlyObjectWrapper<>(param.getValue().get(finalIdx)));

                            /*
                             * System.out.println(new
                             * ReadOnlyObjectWrapper<>(param.getValue().get(
                             * finalIdx)));
                             */

                            tableView.getColumns().add(column);
                        }

                        // tableView.getColumns().addAll(tableColumns);
                    } else {
                        ObservableList<String> row = FXCollections.observableArrayList();
                        row.clear();
                        items = l.split(",");
                        for (String item : items) {
                            System.out.println(item);
                            row.add(item);
                        }
                        csvData.add(row);
                    }
                    i++;

                }

                tableView.setItems(csvData);

            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("File Not Found");
        }

    }
}

String[] title = new String[]{"name","address","email"};
        for (String t : title) {
        TableColumn<Model,Object> col = new TableColumn<>(t.toUpperCase());
        col.setCellValueFactory(new PropertyValueFactory<>(t));
        table.getColumns().add(col);
    }



   table.getItems().add(new Model("Haroon","Kapisa","[email protected]"));

I got the answer for this James_D and thank you.

public class FXMLDocumentController implements Initializable {
    
    @FXML private TableView tableView;
     List<String> columns = new ArrayList<String>();
    
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
        try {
            
            CsvReader products = new CsvReader("C:\\Users\\admin\\Desktop\\Project\\shipforecast\\Data\\Recieve\\ShipId-1432530905282-1.csv");
        
            products.readHeaders();
                        
                       String s[]=products.getHeaders();
                       //int count=0;
                       
                       for(int i=0;i<s.length;i++)
                       {
                           columns.add(s[i]);
                       }
                       System.out.println(columns.size());
                       TableColumn [] tableColumns = new TableColumn[columns.size()];     
                      int columnIndex = 0;
                      for(int  k=0 ; k<columns.size(); k++) {
                      final int j = k;
                     TableColumn col = new TableColumn(columns.get(k));
                        
             
    
    
        col.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList,String>,ObservableValue<String>>(){                   
           public ObservableValue<String> call(TableColumn.CellDataFeatures<ObservableList, String> param) {                                                                                             
                return new SimpleStringProperty(param.getValue().get(j).toString());                       
            }                   
        });
        tableView.getColumns().addAll(col);
    }
    while (products.readRecord())
            {
                         ObservableList<String> row = FXCollections.observableArrayList();    
                        for(int x=0;x<s.length;x++)
                        {
                            
                            int count=0;
                        //System.out.println(s[x]);
                String Valid = products.get(s[x]);
                                row.addAll(Valid);
                
                
                                
            }
                        
                        tableView.getItems().add(row);
                        }
    
    }   catch (Exception ex) {    
           ex.printStackTrace();
        }    
    
}
}