The program uses a lambda expression event handler to validate user selection and act accordingly. If the user selection is valid against the registration business rules, the program displays a registration confirmation message to the student for the selected course. Otherwise, the program displays an error message explaining the reason for the invalidation of the selection. The application maintains and displays a current list of registered courses. Additionally, the application maintains and displays cumulative total credit hours the student has registered for thus far. Each class is 3 credit hours. A max of 9 credit hours and you receive an error message for duplicate courses selected. Use these course codes, in this order, to test your application: IT2230 IT3349 IT2230 IT4782 IT4784

Program 1 followed by Course.java

package u4a1_javafxregisterforcourse;

import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.StackPane; import javafx.stage.Stage; import javafx.scene.layout.GridPane; import javafx.geometry.Insets; import javafx.scene.control.Label; import javafx.scene.text.Font; import javafx.scene.text.FontPosture; import javafx.scene.text.FontWeight; import javafx.scene.image.ImageView; import javafx.scene.paint.Color; import javafx.geometry.HPos; import javafx.geometry.VPos; import javafx.scene.layout.RowConstraints; import javafx.scene.control.ComboBox; import javafx.scene.control.TextField;

public class U4A1_JavaFXRegisterForCourse extends Application { GridPane grid = new GridPane(); Label selectPromptLabel = new Label("Please select a course for which you want to register"); ComboBox coursesComboBox = new ComboBox<>(); Label confirmPromptLabel = new Label(""); Label registeredCoursesPromptLabel = new Label("You are currently registered for"); Label creditHourPromptLabel = new Label("Current total Credit Hours"); Label registeredCoursesLabel = new Label(""); Label creditHoursLabel = new Label("0");

Course choice; int totalCredit = 0; @Override public void start(Stage primaryStage) {

/* grid.setHgap(0); grid.setVgap(500);

grid.setGridLinesVisible(true); */ RowConstraints row0 = new RowConstraints(); RowConstraints row1 = new RowConstraints(); RowConstraints row2 = new RowConstraints(); RowConstraints row3 = new RowConstraints(); RowConstraints row4 = new RowConstraints(); row0.setPercentHeight(5); row1.setPercentHeight(50); row2.setPercentHeight(10); row3.setPercentHeight(5); row4.setPercentHeight(15); grid.getRowConstraints().addAll(row0, row1,row2, row3, row4);

grid.setAlignment(Pos.CENTER);

grid.setHgap(5); grid.setVgap(5); grid.add(selectPromptLabel, 0, 0); grid.setHalignment(selectPromptLabel, HPos.LEFT);

coursesComboBox.getItems().addAll( new Course("IT4782"), new Course("IT4784"), new Course("IT4786"), new Course("IT4789"), new Course("IT2230"), new Course("IT3345"), new Course("IT3349") ); coursesComboBox.setMaxWidth(Double.MAX_VALUE);

grid.add(coursesComboBox, 0, 1); grid.setValignment(coursesComboBox, VPos.TOP);

confirmPromptLabel.setTextFill(Color.RED); grid.add(confirmPromptLabel, 0, 2); grid.setHalignment(confirmPromptLabel, HPos.LEFT); grid.setValignment(confirmPromptLabel, VPos.TOP);

grid.add(registeredCoursesPromptLabel, 0, 3); grid.setHalignment(registeredCoursesPromptLabel, HPos.LEFT); grid.setValignment(registeredCoursesPromptLabel, VPos.TOP); grid.add(creditHourPromptLabel, 1, 3); grid.setHalignment(creditHourPromptLabel, HPos.LEFT); grid.setValignment(creditHourPromptLabel, VPos.TOP); grid.add(registeredCoursesLabel, 0, 4); grid.setHalignment(registeredCoursesLabel, HPos.LEFT); grid.setValignment(registeredCoursesLabel, VPos.TOP); registeredCoursesLabel.setStyle("-fx-background-color: #fff600;"); grid.add(creditHoursLabel, 1, 4); grid.setHalignment(creditHoursLabel, HPos.LEFT); grid.setValignment(creditHoursLabel, VPos.TOP); creditHoursLabel.setStyle("-fx-background-color: #fff600;"); Scene scene = new Scene(grid, 500, 500, Color.RED); primaryStage.setTitle("JavaFX Register for Course"); primaryStage.setScene(scene); primaryStage.show(); coursesComboBox.setOnAction(e -> { choice = coursesComboBox.getValue(); // TO DO - Add Code to: // Validate user selection (the choice Course object) // Display a confirmation or error message accordingly // Update display of registered courses and the total credit hours as appropriate

}); }

/** * @param args the command line arguments */ public static void main(String[] args) { launch(args); } }

Program 2

package u4a1_javafxregisterforcourse;

public class Course { private String code = ""; private boolean isRegisterdFor = false; public Course(String code){ this.code = code; } public void setCode(String code){ this.code = code; } public String getCode() { return this.code; } public void setIsRegisteredFor(boolean trueOrFalse){ this.isRegisterdFor = trueOrFalse; } public boolean getIsRegisteredFor() { return this.isRegisterdFor; } @Override public String toString(){ return this.getCode(); } }