1.Problem Description Student information management system is used to input, display student information records. 1. The GUI interface for inputing ia designed as follows: The top part are the student imformation used to input student information and the bottom part are four buttonns, 2. each button meaning: 3. (2) Total: add java score and C++ score, and display the result 4. (3) Save: save student record into file named student.dat; 5. (4) Clear: set all fields on GUI to empty string: 6. (5) Close: close the window of GUI Student ID: Java Score: Note: Student Management System Student name: C++ Score: Sex Male Female

Step 1: Create StudentManagementApplication.java and below code.

package com.chegg.jun11a.javafx;

import java.io.FileWriter;
import java.io.IOException;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;

public class StudentManagementApplication extends Application {

	public static final String BLANK = "";

	public static final String OUTPUT_FILE_PATH = "C:\\Users\\bsayyad\\eclipse-workspace-unifier\\CheggSolutions-Jun-2021\\src\\main\\java\\com\\chegg\\jun11a\\javafx\\student.dat";

	@Override
	public void start(Stage stage) {
		stage.setTitle("Student Management System");

		GridPane grid = new GridPane();
		grid.setAlignment(Pos.CENTER);
		grid.setHgap(10);
		grid.setVgap(10);
		grid.setPadding(new Insets(25, 25, 25, 25));

		Label sceneTitle = new Label("Student Management System");
		sceneTitle.setFont(Font.font("Tahoma", FontWeight.NORMAL, 30));
		sceneTitle.setStyle("-fx-text-fill: #5933FF;");
		grid.add(sceneTitle, 2, 0, 2, 1);

		Label studentIdLabel = new Label("Student ID:");
		grid.add(studentIdLabel, 0, 1);

		TextField studentIdField = new TextField();
		grid.add(studentIdField, 1, 1);

		Label studentNameLabel = new Label("Student Name:");
		grid.add(studentNameLabel, 2, 1);

		TextField studentNameField = new TextField();
		grid.add(studentNameField, 3, 1);

		Label sexLabel = new Label("Sex");
		grid.add(sexLabel, 4, 1);

		RadioButton maleRb = new RadioButton("Male");
		RadioButton femaleRb = new RadioButton("Female");
		ToggleGroup sexGroup = new ToggleGroup();
		maleRb.setToggleGroup(sexGroup);
		femaleRb.setToggleGroup(sexGroup);
		HBox sexSelector = new HBox(10, maleRb, femaleRb);
		grid.add(sexSelector, 5, 1);

		Label javaScoreLabel = new Label("Java Score:");
		grid.add(javaScoreLabel, 0, 2);

		TextField javaScoreField = new TextField();
		grid.add(javaScoreField, 1, 2);

		Label cppScoreLabel = new Label("C++ Score:");
		grid.add(cppScoreLabel, 2, 2);

		TextField cppScoreField = new TextField();
		grid.add(cppScoreField, 3, 2);

		Label noteLabel = new Label("Note:");
		grid.add(noteLabel, 0, 3);

		TextField noteField = new TextField();
		grid.add(noteField, 0, 4, 6, 1);

		Label totalScoresLabel = new Label("Total Scores:");
		grid.add(totalScoresLabel, 4, 5);

		TextField totalScoreField = new TextField();
		totalScoreField.setEditable(false);
		grid.add(totalScoreField, 5, 5);

		Button totalButton = new Button("Total");
		totalButton.setPrefWidth(500);
		Button saveButton = new Button("Save");
		saveButton.setPrefWidth(500);
		Button clearButton = new Button("Clear");
		clearButton.setPrefWidth(500);
		Button closeButton = new Button("Close");
		closeButton.setPrefWidth(500);

		HBox hBoxDisplay = new HBox(totalButton, saveButton, clearButton, closeButton);
		grid.add(hBoxDisplay, 0, 6, 6, 1);

		totalButton.setOnAction(actionEvent -> {
			String studentId = studentIdField.getText();
			String studentName = studentNameField.getText();
			RadioButton sexSelection = (RadioButton) sexGroup.getSelectedToggle();
			String sex = (sexSelection == null) ? "" : sexSelection.getText();
			String javaScore = javaScoreField.getText();
			String cppScore = cppScoreField.getText();
			if (BLANK.equals(studentId) || BLANK.equals(studentName) || BLANK.equals(sex) || BLANK.equals(javaScore)
					|| BLANK.equals(cppScore)) {
				this.alert("Error", "Please enter all input values!", AlertType.ERROR);
				return;
			} else {
				double java = Double.parseDouble(javaScore);
				double cpp = Double.parseDouble(cppScore);
				double total = java + cpp;
				totalScoreField.setText(String.valueOf(total));
				if (java < cpp) {
					noteField.setText("Hey study Java hard.");
				} else {
					noteField.setText("Hey study C++ hard.");
				}
			}

		});

		saveButton.setOnAction(actionEvent -> {
			String studentId = studentIdField.getText();
			String studentName = studentNameField.getText();
			RadioButton sexSelection = (RadioButton) sexGroup.getSelectedToggle();
			String sex = sexSelection.getText();
			String javaScore = javaScoreField.getText();
			String cppScore = cppScoreField.getText();
			if (BLANK.equals(studentId) || BLANK.equals(studentName) || BLANK.equals(sex) || BLANK.equals(javaScore)
					|| BLANK.equals(cppScore)) {
				this.alert("Error", "Please enter all input values!", AlertType.ERROR);
				return;
			} else {
				double java = Double.parseDouble(javaScore);
				double cpp = Double.parseDouble(cppScore);
				double total = java + cpp;
				totalScoreField.setText(String.valueOf(total));

				try {
					FileWriter writer = new FileWriter(OUTPUT_FILE_PATH, true);
					writer.write(studentId + "," + studentName + "," + sex + "," + javaScore + "," + cppScore + ","
							+ total + "\n");
					writer.close();
					this.alert("Success", "Record saved successfully", AlertType.INFORMATION);
				} catch (IOException e) {
					e.printStackTrace();
				}

			}

		});

		clearButton.setOnAction(actionEvent -> {
			studentIdField.setText(BLANK);
			studentNameField.setText(BLANK);
			javaScoreField.setText(BLANK);
			cppScoreField.setText(BLANK);
			noteField.setText(BLANK);
			totalScoreField.setText(BLANK);
			sexGroup.getSelectedToggle().setSelected(false);
		});

		closeButton.setOnAction(actionEvent -> {
			System.exit(0);
		});

		Scene scene = new Scene(grid, 1050, 400);
		stage.setScene(scene);

		stage.show();
	}

	public void alert(String title, String message, AlertType alertType) {
		Alert alert = new Alert(alertType);
		alert.setTitle(title);
		alert.setHeaderText(null);
		alert.setContentText(message);
		alert.showAndWait();
	}

	public static void main(String[] args) {
		launch(args);
	}
}

Now run the above code. Below window will be opened.

Now fill the data and click on Total button. Total score wil be calculated and based on score, note field will get updated.

Now click on Save button.

We can see the saved details in the file.