Question

In Java, specifically using javafx and NOT SWING , thanks!

To write a program that illustrates how to code a box with buttons on the screen and to create an event class to handle the click of a button

Write a program using a layout manager. You must write the program to meet the following criteria:

Create a window with a layout.

Add 6 buttons to the window, each with a number to identify it – such as Button1, Button2, Button3, Button4, Button5, Button6.

When a button is clicked, it will create an event object.

Create a listener object that will respond to the event object by displaying a message to the screen stating which button was clicked.

Hint: Make a separate class to handle the event (clicking the button).

Answer 1

Code:-

import javafx.scene.control.Label;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.stage.Stage;
import javafx.scene.layout.*; //importing
public class button extends Application { //button class which extends the Application class
public void start(Stage s) //start function
{
   Button button1,button2,button3,button4,button5,button6; //declaring buttons
    button1 = new Button("Button1"); //creating button1
   button2 = new Button("Button2"); //creating button2
    button3 = new Button("Button3"); //creating button3
    button4 = new Button("Button4"); //creating button4
    button5 = new Button("Button5"); //creating button5
    button6 = new Button("Button6"); //creating button6
TilePane lay = new TilePane(); //layout TitlePane
Label l = new Label("Nothing Clicked"); //label to sho which button is clicked when no button is clicked it displays (Nothing Clicked)
EventHandler<ActionEvent> event1 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button1 is clicked
{
l.setText("Button1 clicked");
}
};
EventHandler<ActionEvent> event2 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button2 is clicked
{
l.setText("Button2 clicked");
}
};
   EventHandler<ActionEvent> event3 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button3 is clicked
{
l.setText("Button3 clicked");
}
};
   EventHandler<ActionEvent> event4 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button4 is clicked
{
l.setText("Button4 clicked");
}
};
   EventHandler<ActionEvent> event5 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button5 is clicked
{
l.setText("Button5 clicked");
}
};
   EventHandler<ActionEvent> event6 = new EventHandler<ActionEvent>() { //creating object for eventhandler
public void handle(ActionEvent e) //listener function when button6 is clicked
{
l.setText("Button6 clicked");
}
};

button1.setOnAction(event1); //onclick listener for button1
button2.setOnAction(event2); //onclick listener for button2
button3.setOnAction(event3); //onclick listener for button3
button4.setOnAction(event4); //onclick listener for button4
button5.setOnAction(event5); //onclick listener for button5
button6.setOnAction(event6); //onclick listener for button6
lay.getChildren().addAll(button1,button2,button3,button4,button5,button6,l); //adding buttons to the TitlePane layout
Scene sc = new Scene(lay, 200, 200); //adding layout to scene
s.setScene(sc); //setting scene
s.show(); //showing scene
}
public static void main(String args[]) //main function
{
launch(args); //launching which calls start function automatically
}
}

Output:-