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281 changes: 281 additions & 0 deletions Java Assignment2
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Original file line number Diff line number Diff line change
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// QUESTION1
import java.util.Scanner;

public class Loan {

private double monthlyPayment;
private int yearsForPayment;
private double totalAmount;


public Loan() {

this.totalAmount = 0;
}


public void setMonthlyPayment(double monthlyPayment) {
this.monthlyPayment = monthlyPayment;
this.totalAmount = calculateTotalAmount();
}


public void setYearsForPayment(int yearsForPayment) {
this.yearsForPayment = yearsForPayment;
this.totalAmount = calculateTotalAmount();
}


public double calculateTotalAmount() {

return this.monthlyPayment * this.yearsForPayment * 12;
}


public double getTotalAmount() {
return this.totalAmount;
}

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
Loan loan = new Loan();


System.out.print("Enter the monthly payment: ");
double monthlyPayment = scan.nextDouble();
loan.setMonthlyPayment(monthlyPayment);

System.out.print("Enter the years for payment: ");
int yearsForPayment = scan.nextInt();
loan.setYearsForPayment(yearsForPayment);


System.out.println("\nLoan Details:");
System.out.println("Monthly Payment: " + monthlyPayment +"FRW");
System.out.println("Years for Payment: " + yearsForPayment);
System.out.println("Total Amount to be Paid: " + loan.getTotalAmount() +"FRW");


}
}

//QUESTION2

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

public class StudentInfo {

// Database connection details
private static final String URL = "jdbc:mysql://localhost:3306/Students"; // Empty URL for creating a new database
private static final String USER = "root"; // Database username
private static final String PASSWORD = ""; // Database password

// Method to establish a connection to the database
public static Connection connect() throws SQLException {
return DriverManager.getConnection(URL, USER, PASSWORD);
}

// Method to create database and table
public static void createDatabaseAndTable() {
try (Connection conn = connect();
Statement stmt = conn.createStatement()) {

// Create Database
String createDatabaseSQL = "CREATE DATABASE IF NOT EXISTS Students";
stmt.executeUpdate(createDatabaseSQL);

// Use the created database
String useDatabaseSQL = "USE Student2";
stmt.executeUpdate(useDatabaseSQL);

// Create Table
String createTableSQL = "CREATE TABLE IF NOT EXISTS STUDENT (" +
"reg_number INT PRIMARY KEY, " +
"last_name VARCHAR(100), " +
"first_name VARCHAR(100), " +
"years_of_study INT, " +
"telephone VARCHAR(15), " +
"college VARCHAR(100), " +
"email VARCHAR(100))";

stmt.executeUpdate(createTableSQL);

System.out.println("Database and table created successfully.");
} catch (SQLException e) {
System.out.println("Error creating database or table: " + e.getMessage());
}
}

// Method to insert student data into the database
public void insertStudent(int regNumber, String lastName, String firstName, int yearsOfStudy,
String telephone, String college, String email) {
String sql = "INSERT INTO STUDENT(reg_number, last_name, first_name, years_of_study, telephone, college, email, physics, mathematics, chemistry, biology) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
try (Connection conn = connect();
PreparedStatement pstmt = conn.prepareStatement(sql)) {
pstmt.setInt(1, regNumber);
pstmt.setString(2, lastName);
pstmt.setString(3, firstName);
pstmt.setInt(4, yearsOfStudy);
pstmt.setString(5, telephone);
pstmt.setString(6, college);
pstmt.setString(7, email);
pstmt.executeUpdate();
JOptionPane.showMessageDialog(null, "Data inserted correctly.");
} catch (SQLException e) {
JOptionPane.showMessageDialog(null, "Error for data inserted: " + e.getMessage());
}
}

public static void main(String[] args) {
// Create the database and table
createDatabaseAndTable();

JFrame frame = new JFrame("Student Information");
frame.setSize(500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel panel = new JPanel();
frame.add(panel);
placeComponents(panel);

frame.setVisible(true);
}

private static void placeComponents(JPanel panel) {
panel.setLayout(null);
panel.setBackground(Color.GRAY); // Light black background

// Labels and text fields
Font labelFont = new Font("Arial", Font.BOLD, 14);
Font textFont = new Font("Arial", Font.PLAIN, 12);

JLabel regLabel = new JLabel("Reg Number:");
regLabel.setBounds(10, 20, 100, 25);
regLabel.setForeground(Color.WHITE);
regLabel.setFont(labelFont);
panel.add(regLabel);

JTextField regText = new JTextField(20);
regText.setBounds(120, 20, 165, 25);
regText.setFont(textFont);
regText.setBackground(new Color(240, 240, 240)); // Light background for text fields
panel.add(regText);

JLabel lastNameLabel = new JLabel("Last Name:");
lastNameLabel.setBounds(10, 50, 100, 25);
lastNameLabel.setForeground(Color.WHITE);
lastNameLabel.setFont(labelFont);
panel.add(lastNameLabel);

JTextField lastNameText = new JTextField(20);
lastNameText.setBounds(120, 50, 165, 25);
lastNameText.setFont(textFont);
lastNameText.setBackground(new Color(240, 240, 240));
panel.add(lastNameText);

JLabel firstNameLabel = new JLabel("First Name:");
firstNameLabel.setBounds(10, 80, 100, 25);
firstNameLabel.setForeground(Color.WHITE);
firstNameLabel.setFont(labelFont);
panel.add(firstNameLabel);

JTextField firstNameText = new JTextField(20);
firstNameText.setBounds(120, 80, 165, 25);
firstNameText.setFont(textFont);
firstNameText.setBackground(new Color(240, 240, 240));
panel.add(firstNameText);

JLabel yearsLabel = new JLabel("Years of Study:");
yearsLabel.setBounds(10, 110, 100, 25);
yearsLabel.setForeground(Color.WHITE);
yearsLabel.setFont(labelFont);
panel.add(yearsLabel);

JTextField yearsText = new JTextField(20);
yearsText.setBounds(120, 110, 165, 25);
yearsText.setFont(textFont);
yearsText.setBackground(new Color(240, 240, 240));
panel.add(yearsText);

JLabel phoneLabel = new JLabel("Telephone:");
phoneLabel.setBounds(10, 140, 100, 25);
phoneLabel.setForeground(Color.WHITE);
phoneLabel.setFont(labelFont);
panel.add(phoneLabel);

JTextField phoneText = new JTextField(20);
phoneText.setBounds(120, 140, 165, 25);
phoneText.setFont(textFont);
phoneText.setBackground(new Color(240, 240, 240));
panel.add(phoneText);

JLabel collegeLabel = new JLabel("College:");
collegeLabel.setBounds(10, 170, 100, 25);
collegeLabel.setForeground(Color.WHITE);
collegeLabel.setFont(labelFont);
panel.add(collegeLabel);

JTextField collegeText = new JTextField(20);
collegeText.setBounds(120, 170, 165, 25);
collegeText.setFont(textFont);
collegeText.setBackground(new Color(240, 240, 240));
panel.add(collegeText);

JLabel emailLabel = new JLabel("Email:");
emailLabel.setBounds(10, 200, 100, 25);
emailLabel.setForeground(Color.WHITE);
emailLabel.setFont(labelFont);
panel.add(emailLabel);

JTextField emailText = new JTextField(20);
emailText.setBounds(120, 200, 165, 25);
emailText.setFont(textFont);
emailText.setBackground(new Color(240, 240, 240));
panel.add(emailText);

// Buttons (styled)
JButton submitButton = new JButton("Submit");
submitButton.setBounds(120, 230, 100, 40);
submitButton.setBackground(Color.BLUE); // Light Red
submitButton.setForeground(Color.BLACK);
panel.add(submitButton);

JButton searchButton = new JButton("Search");
searchButton.setBounds(230, 230, 100, 40);
searchButton.setBackground(Color.YELLOW); // Light Red
searchButton.setForeground(Color.BLACK);
panel.add(searchButton);

// Action for Submit button
submitButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int regNumber = Integer.parseInt(regText.getText());
String lastName = lastNameText.getText();
String firstName = firstNameText.getText();
int yearsOfStudy = Integer.parseInt(yearsText.getText());
String telephone = phoneText.getText();
String college = collegeText.getText();
String email = emailText.getText();

new StudentInfo().insertStudent(regNumber, lastName, firstName, yearsOfStudy, telephone, college, email);
}
});


searchButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, "Search failed !");
}
});
}
}