' Create a JavaFX GUI tool to track Student Payments. Users should…

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Manu · Accepted Answer

Step 1: import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.Stage; import java.io.*; import java.util.ArrayList; import java.util.List; public class StudentPaymentTracker extends Application { private ListView studentListView; private TextField nameField, phoneField, balanceField; private ComboBox paidComboBox; private Label totalBalanceLabel, ratioLabel; private List students; private File file; public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) { students = new ArrayList<>(); file = new File("students.txt"); loadStudentsFromFile(); primaryStage.setTitle("Student Payment Tracker"); studentListView = new ListView<>(); studentListView.getItems().addAll(getStudentNames()); studentListView.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) -> displayStudentInfo(newValue)); nameField = new TextField(); phoneField = new TextField(); balanceField = new TextField(); paidComboBox = new ComboBox<>(); paidComboBox.getItems().addAll("Yes", "No"); Button addButton = new Button("Add"); addButton.setOnAction(e -> addStudent()); Button deleteButton = new Button("Delete"); deleteButton.setOnAction(e -> deleteStudent()); Button editButton = new Button("Edit"); editButton.setOnAction(e -> editStudent()); totalBalanceLabel = new Label("Total Balance Still unpaid by all students: $0"); ratioLabel = new Label("Ratio Students Paid to Unpaid: 0:0"); GridPane formPane = new GridPane(); formPane.setHgap(10); formPane.setVgap(10); formPane.add(new Label("Name:"), 0, 0); formPane.add(nameField, 1, 0); formPane.add(new Label("Phone:"), 0, 1); formPane.add(phoneField, 1, 1); formPane.add(new Label("Balance Due:"), 0, 2); formPane.add(balanceField, 1, 2); formPane.add(new Label("Paid:"), 0, 3); formPane.add(paidComboBox, 1, 3); formPane.add(addButton, 0, 4); formPane.add(deleteButton, 1, 4); formPane.add(editButton, 2, 4); VBox leftPane = new VBox(10, new Label("Students:"), studentListView); leftPane.setPadding(new Insets(10)); leftPane.setMinWidth(200); VBox rightPane = new VBox(10, new Label("Student Info"), formPane); rightPane.setPadding(new Insets(10)); HBox mainPane = new HBox(10, leftPane, rightPane); mainPane.setPadding(new Insets(10)); VBox root = new VBox(10, mainPane, totalBalanceLabel, ratioLabel); root.setPadding(new Insets(10)); Scene scene = new Scene(root, 800, 600); primaryStage.setScene(scene); primaryStage.show(); updateStatistics(); } private void addStudent() { String name = nameField.getText(); String phone = phoneField.getText(); double balance = Double.parseDouble(balanceField.getText()); boolean paid = paidComboBox.getValue().equals("Yes"); Student student = new Student(name, phone, balance, paid); students.add(student); studentListView.getItems().add(name); saveStudentsToFile(); updateStatistics(); clearForm(); } private void deleteStudent() { String selectedName = studentListView.getSelectionModel().getSelectedItem(); if (selectedName != null) { students.removeIf(student -> student.getName().equals(selectedName)); studentListView.getItems().remove(selectedName); saveStudentsToFile(); updateStatistics(); } } private void editStudent() { String selectedName = studentListView.getSelectionModel().getSelectedItem(); if (selectedName != null) { Student student = students.stream() .filter(s -> s.getName().equals(selectedName)) .findFirst() .orElse(null); if (student != null) { student.setName(nameField.getText()); student.setPhone(phoneField.getText()); student.setBalance(Double.parseDouble(balanceField.getText())); student.setPaid(paidComboBox.getValue().equals("Yes")); saveStudentsToFile(); updateStatistics(); } } } private void displayStudentInfo(String name) { Student student = students.stream() .filter(s -> s.getName().equals(name)) .findFirst() .orElse(null); if (student != null) { nameField.setText(student.getName()); phoneField.setText(student.getPhone()); balanceField.setText(String.valueOf(student.getBalance())); paidComboBox.setValue(student.isPaid() ? "Yes" : "No"); } } private void updateStatistics() { double totalBalance = students.stream() .filter(student -> !student.isPaid()) .mapToDouble(Student::getBalance) .sum(); long paidCount = students.stream().filter(Student::isPaid).count(); long unpaidCount = students.size() - paidCount; totalBalanceLabel.setText("Total Balance Still unpaid by all students: $" + totalBalance); ratioLabel.setText("Ratio Students Paid to Unpaid: " + paidCount + ":" + unpaidCount); } private List getStudentNames() { List names = new ArrayList<>(); for (Student student : students) { names.add(student.getName()); } return names; } private void clearForm() { nameField.clear(); phoneField.clear(); balanceField.clear(); paidComboBox.setValue(null); } p

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