Author Question: Analyze the following code.import javafx.application.Application;import ... (Read 74 times)

rachel9 · **on:** May 6, 2020

Analyze the following code.

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class Test extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {

Button btOK = new Button("OK");

Button btCancel = new Button("Cancel");

EventHandler handler = new EventHandler() {

public void handle(ActionEvent e) {

System.out.println("The OK button is clicked");

}

};

btOK.setOnAction(handler);

btCancel.setOnAction(handler);

HBox pane = new HBox(5);

pane.getChildren().addAll(btOK, btCancel);

Scene scene = new Scene(pane, 200, 250);

primaryStage.setTitle("Test"); // Set the stage title

primaryStage.setScene(scene); // Place the scene in the stage

primaryStage.show(); // Display the stage

}

/**
* The main method is only needed for the IDE with limited JavaFX
* support. Not needed for running from the command line.
*/
public static void main(String[] args) {

launch(args);

}
}

◦ The program has a runtime error, because the handler is registered with more than one source.
◦ When clicking the OK button, the program displays The OK button is clicked.
◦ When clicking either button, the program displays The OK button is clicked twice.
◦ When clicking the Cancel button, the program displays The OK button is clicked.

bbburns21 · **Reply #1 on:** May 6, 2020

A FREE account is required to view all solutions!

Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.

Answer Preview

Only 25% of students answer this correctly