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package JavaFXDemo;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class Main10 extends Application {
//Application is the class that inherits all the functionality
Stage window;
Scene scene;
Button button;
public static void main(String[] args) {
launch(args);
//launch(args) is a method that is called once the main program starts and goes inside the application class
//it sets ups your javafx application
}
@Override
public void start(Stage primaryStage) throws Exception {
//the application will call a method called start, start is actually overridden because you are inheriting
//it from the application class. The start method passes in the primaryStage which is the main window for
//the application.
window = primaryStage;
window.setTitle("thenewboston");//sets the title of the window
//Form
TextField nameInput = new TextField();
button = new Button("Click me");
button.setOnAction(e -> isInt(nameInput, nameInput.getText()) );
//Layout
VBox layout = new VBox(10);
layout.setPadding(new Insets(20, 20, 20, 20));
layout.getChildren().addAll(nameInput, button); //add button and Input field to the layout
Scene scene = new Scene(layout, 300, 250); //Create scene of the Scene class, pass in layout object and hw
window.setScene(scene); //pass in scene object to set Scene of window
window.show(); //show the window
}
private boolean isInt(TextField input, String message) {//method that will validate whether the input is a number
//better to use input instead of messagebecause can refer to it in order to put a color in input TextField
try{
int age = Integer.parseInt(input.getText());
System.out.println("User is: " + age);
return true;
}catch(NumberFormatException e){
System.out.println("Error: " + message + " is not a number");
return false;
}
}
}