TableView Not Being Populated

Question

Does anyone have any idea why the table is not getting populated with the products?

MainController class:

//imports

Public class MainController implements Initializable {
    @FXML
    private TableView<Product> table;

    @Override
    public void initialize(URL arg0, ResourceBundle arg1) {
        TableColumn<Product, Long> prIDColumn = new TableColumn<Product, Long>("PrID");
        prIDColumn.setCellValueFactory(new PropertyValueFactory<Product, Long>("productID"));

        TableColumn<Product, String> productColumn = new TableColumn<Product, String>("Product");
        productColumn.setCellValueFactory(new PropertyValueFactory<Product, String>("productName"));

        TableColumn<Product, Integer> quantityColumn = new TableColumn<Product, Integer>("Quantity");
        quantityColumn.setCellValueFactory(new PropertyValueFactory<Product, Integer>("productQuantity"));

        TableColumn<Product, Integer> taxColumn = new TableColumn<Product, Integer>("Tax%");
        taxColumn.setCellValueFactory(new PropertyValueFactory<Product, Integer>("taxPercentage"));

        TableColumn<Product, Integer> priceColumn = new TableColumn<Product, Integer>("Price");
        priceColumn.setCellValueFactory(new PropertyValueFactory<Product, Integer>("totalPrice"));

        table.getColumns().add(prIDColumn);
        table.getColumns().add(productColumn);
        table.getColumns().add(quantityColumn);
        table.getColumns().add(taxColumn);
        table.getColumns().add(priceColumn);

        table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
    }

    //other unrelated code

    public void addProducts(ActionEvent event) {  //Linked with the "Add Product" button.
        try {
            table.getItems().add(new Product(1234, "Mayo", 1, 5, 100));
            table.getItems().add(new Product(2345, "Ketchup", 2, 3, 90));
        } catch(Exception e) {
            System.err.println(e);
        }
    }
}

Product class:

public class Product {
    private int productID;
    private String productName;
    private int productQuantity;
    private int taxPercentage;
    private int totalPrice;

    public Product(int productID, String productName, int productQuantity, int taxPercentage, int totalPrice) {
        this.productID = productID;
        this.productName = productName;
        this.productQuantity = productQuantity;
        this.taxPercentage = taxPercentage;
        this.totalPrice = totalPrice;
    }

    public int getProductID() {
        return productID;
    }
    public String getProductName() {
        return productName;
    }
    public int getProductQuantity() {
        return productQuantity;
    }
    public int getTaxPercentage() {
        return taxPercentage;
    }
    public int getTotalPrice() {
        return totalPrice;
    }

    public void setProductID(int productID) {
        this.productID = productID;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public void setProductQuantity(int productQuantity) {
        this.productQuantity = productQuantity;
    }
    public void setTaxPercentage(int taxPercentage) {
        this.taxPercentage = taxPercentage;
    }
    public void setTotalPrice(int totalPrice) {
        this.totalPrice = totalPrice;
    }
}

MainScene FXML file:

Thanks in advance.

I suggest that you use lambda's like [this example](https://stackoverflow.com/questions/70175587/how-do-you-use-a-javafx-tableview-with-java-records). With a lambda you get compile time type checking and identifier matching, rather than runtime failures for type and name mismatches with PropertyValueFactory. — jewelsea, Apr 21 '22 at 20:39

score 0 · Answer 1 · edited Apr 22 '22 at 13:33

you have

TableColumn<Product, Long> prIDColumn = new TableColumn<Product, Long>("PrID");
    prIDColumn.setCellValueFactory(new PropertyValueFactory<Product, Long>("productID"));

but productID is an int not a long in product class

then

TableColumn<Product, Integer> prIDColumn = new TableColumn<Product,Integer>("PrID");
        prIDColumn.setCellValueFactory(new PropertyValueFactory<Product, Integer>("productID"));

Or change productID from int to long in Product class

its better you to use StringProperty or IntegerProperty rather than int or String in your model for work with TableView

TableView Not Being Populated

1 Answers1