Hướng dẫn sử dụng JavaFX GridPane Layout

package org.o7planning.javafx.gridpane;

import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class GridPaneDemo extends Application {

   @Override
   public void start(Stage primaryStage) throws Exception {
       GridPane root = new GridPane();

       root.setPadding(new Insets(20));
       root.setHgap(25);
       root.setVgap(15);

       Label labelTitle = new Label("Enter your user name and password!");

 
       // Đặt vào ô lưới (0, 0) , bắc qua 2 cột, 1 dòng.
       root.add(labelTitle, 0, 0, 2, 1);

       Label labelUserName = new Label("User Name");
       TextField fieldUserName = new TextField();

       Label labelPassword = new Label("Password");

       PasswordField fieldPassword = new PasswordField();

       Button loginButton = new Button("Login");

       GridPane.setHalignment(labelUserName, HPos.RIGHT);

 
       // Đặt vào ô lưới (0,1)
       root.add(labelUserName, 0, 1);

       
       GridPane.setHalignment(labelPassword, HPos.RIGHT);
       root.add(labelPassword, 0, 2);
 
       // Căn lề trái cho User Name
       GridPane.setHalignment(fieldUserName, HPos.LEFT);
       root.add(fieldUserName, 1, 1);

 
       // Căn lề trái cho trường Password
       GridPane.setHalignment(fieldPassword, HPos.LEFT);
       root.add(fieldPassword, 1, 2);

 
       // Căn lề phải cho button Login.
       GridPane.setHalignment(loginButton, HPos.RIGHT);
       root.add(loginButton, 1, 3);

       Scene scene = new Scene(root, 300, 300);
       primaryStage.setTitle("GridPanel Layout Demo (o7planning.org)");
       primaryStage.setScene(scene);
       primaryStage.show();
   }

   public static void main(String[] args) {
       launch(args);
   }

}