To complete the assignment, we’ll be creating a JavaFX program with a simple user interface for calculating a 20% tip based on a restaurant charge. The program will consist of several JavaFX components: labels, text fields, buttons, and layout containers like This program is a basic JavaFX application that allows a user to calculate a 20% tip based on a restaurant charge entered in a text field. Let’s go step by step to understand the code.<\/p>\n\n\n\n This program demonstrates basic JavaFX controls and event handling, providing an interactive way to calculate and display the tip.<\/p>\n\n\n\n 10 points CISC 3115-1BC Chapter 12: in class assignment Student Name: Step #1: In this in class assignment you will create a tip calculator application with a JavaFX user interface. The application will let you enter the amount of a restaurant charge, and it will display the amount of a 20% tip. The completed user […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45197","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=45197"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45197\/revisions"}],"predecessor-version":[{"id":45199,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/45197\/revisions\/45199"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=45197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=45197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=45197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}VBox<\/code>. Below is a skeleton of the JavaFX program for this task.<\/p>\n\n\n\nJava Code for Skeleton Program<\/h3>\n\n\n\n
javaCopyEdit
import javafx.application.Application;\nimport javafx.scene.Scene;\nimport javafx.scene.control.Button;\nimport javafx.scene.control.Label;\nimport javafx.scene.control.TextField;\nimport javafx.scene.layout.VBox;\nimport javafx.stage.Stage;\n\npublic class TipCalculator extends Application {\n\n @Override\n public void start(Stage primaryStage) {\n\n \/\/ Create the labels\n Label label1 = new Label(\"Restaurant Charge:\");\n Label label2 = new Label(\"Amount to Tip:\");\n\n \/\/ Create a TextField for user input\n TextField chargeField = new TextField();\n \n \/\/ Create a label to display the calculated tip\n Label tipAmountLabel = new Label(\"$0.00\");\n\n \/\/ Create a button to trigger the calculation\n Button calculateButton = new Button(\"Calculate Tip\");\n\n \/\/ Add an event handler for the button click\n calculateButton.setOnAction(e -> {\n try {\n double charge = Double.parseDouble(chargeField.getText());\n double tip = charge * 0.20;\n tipAmountLabel.setText(\"$\" + String.format(\"%.2f\", tip));\n } catch (NumberFormatException ex) {\n tipAmountLabel.setText(\"Invalid input\");\n }\n });\n\n \/\/ Create a VBox layout and add controls\n VBox layout = new VBox(10);\n layout.getChildren().addAll(label1, chargeField, calculateButton, label2, tipAmountLabel);\n\n \/\/ Create a scene with the layout\n Scene scene = new Scene(layout, 300, 200);\n\n \/\/ Set the stage (window)\n primaryStage.setTitle(\"Tip Calculator\");\n primaryStage.setScene(scene);\n primaryStage.show();\n }\n\n public static void main(String[] args) {\n launch(args);\n }\n}\n<\/code><\/pre>\n\n\n\nExplanation <\/h3>\n\n\n\n
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Application<\/code>, Scene<\/code>, Button<\/code>, Label<\/code>, TextField<\/code>, VBox<\/code>, and Stage<\/code>. These are the components that will make up the UI and handle the logic.<\/li>\n\n\n\nTipCalculator<\/code> Class<\/strong>: This class extends Application<\/code>, the main class for JavaFX applications. The start<\/code> method is overridden to set up the UI and event handling.<\/li>\n\n\n\n\n
Label<\/code> (label1<\/code>) prompts the user to enter the restaurant charge.<\/li>\n\n\n\nTextField<\/code> (chargeField<\/code>) allows the user to input the charge.<\/li>\n\n\n\nButton<\/code> (calculateButton<\/code>) is used to trigger the calculation of the tip.<\/li>\n\n\n\nLabel<\/code> (tipAmountLabel<\/code>) will display the calculated tip.<\/li>\n<\/ul>\n<\/li>\n\n\n\ndouble<\/code>, calculates the 20% tip, and updates the tipAmountLabel<\/code>. If the input is not a valid number, it shows “Invalid input”.<\/li>\n\n\n\nVBox<\/code> container, which arranges them vertically. The VBox<\/code> is then added to a Scene<\/code>, which is displayed on the primary Stage<\/code>.<\/li>\n\n\n\nmain<\/code> method calls launch(args)<\/code>, starting the JavaFX application and displaying the window to the user.<\/li>\n<\/ol>\n\n\n\n![\"\"](\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner8-6.jpeg\")
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