How to communicate between classes?

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How to communicate between classes?

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#1 by (2 votes)

2

I'm starting in JavaFX and I'm having second thoughts.

The main class creates an HBox with a button. This button has the action of creating a TableView in the Center of bdPrincipal . Only they are in different classes / packages.

What is the best way to search for bdPrincipal to add addTabela() ?

BorderPane bpPrincipal;
public void start(Stage primaryStage) {
        bpPrincipal = new BorderPane();
        bpPrincipal.setLeft(Menu.addMenu());
        scPrincipal = new Scene(bpPrincipal);
        primaryStage.setScene(scPrincipal);
        primaryStage.centerOnScreen(); 
        primaryStage.setHeight(Screen.getPrimary().getVisualBounds().getHeight()); 
        primaryStage.setWidth(Screen.getPrimary().getVisualBounds().getWidth());        
        primaryStage.show();
    }    


public class Menu {
    public static HBox addMenu() {

        HBox hbox = new HBox();
        hbox.setPadding(new Insets(15, 12, 15, 12));
        hbox.setSpacing(20);
        hbox.setStyle("-fx-background-color: #336699;");

        Button btnListar = new Button("Listar");
        btnListar.setPrefSize(100, 20);
        btnListar.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent evento) {
                  GestorFX.bpPrincipal.setCenter(addTabela());
            }
        });
        hbox.getChildren().addAll(btnListar);

        return hbox;
    }
    @SuppressWarnings({ "rawtypes", "unchecked" })
    private static TableView addTabela()
    {
        TableColumn colCodigo = new TableColumn();
        colCodigo.setText("Código");
        colCodigo.setMinWidth(150);
        colCodigo.setCellValueFactory(new PropertyValueFactory("clienteCodigo"));

        TableColumn colFantasia = new TableColumn();
        colFantasia.setText("Nome Fantasia");
        colFantasia.setMinWidth(450);
        colFantasia.setCellValueFactory(new PropertyValueFactory("clienteFantasia"));

        TableColumn colRazao = new TableColumn();
        colRazao.setText("Razão Social");
        colRazao.setMinWidth(450);
        colRazao.setCellValueFactory(new PropertyValueFactory("clienteRazao"));

        TableView tabela = new TableView();
        tabela.setItems(Negocio.Cliente.ListaCompleta());
        tabela.getColumns().addAll(colCodigo, colFantasia, colRazao);

        return tabela;
    }
}

java classes

asked by anonymous 09.05.2014 / 06:25

1 answer

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score 2 · Accepted Answer

You should basically import the package from the other class and create an object from it, so you can access your public methods.

Assuming your first code that has a BorderPane bpPrincipal; is in the following file:

src \ com \ package \ Paineis.java

Add the following import within your Menu class:

Menu.java

import com.pacote.Paineis;

You can already see the class, now create an object of the Panels class, and access the method you want from that class. Example:

Menu.java

Paineis paineis = new Paineis();
BorderPane bdPrincipal = paineis.getBpPrincipal(); //pronto

Now use bdPrincipal as desired, for example by adding it to the table.

Do not forget to create a method that returns the BorderPane of your Panels class:

Paineis.java

public BorderPane getBpPrincipal() {
        return bpPrincipal;
}