એડવાન્સ જાવા પ્રોગ્રામિંગ (4351603) - ઉનાળા 2024 સોલ્યુશન

import javax.swing.*;
import java.awt.event.*;

class MouseMotionExample extends JFrame implements MouseMotionListener {
    JLabel label;
    
    MouseMotionExample() {
        label = new JLabel("અહીં mouse ખસાડો");
        add(label);
        addMouseMotionListener(this);
        setSize(400, 300);
        setVisible(true);
    }
    
    public void mouseMoved(MouseEvent e) {
        label.setText("Mouse આ સ્થાને: " + e.getX() + ", " + e.getY());
    }
    
    public void mouseDragged(MouseEvent e) {
        label.setText("Dragging આ સ્થાને: " + e.getX() + ", " + e.getY());
    }
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CourseSelection extends JFrame implements ItemListener {
    JCheckBox java, python, cpp, web;
    JTextArea display;
    
    public CourseSelection() {
        setTitle("યુનિવર્સિટી કોર્સ પસંદગી");
        setLayout(new FlowLayout());
        
        // checkboxes બનાવો
        java = new JCheckBox("Java Programming");
        python = new JCheckBox("Python Programming");
        cpp = new JCheckBox("C++ Programming");
        web = new JCheckBox("Web Development");
        
        // listeners ઉમેરો
        java.addItemListener(this);
        python.addItemListener(this);
        cpp.addItemListener(this);
        web.addItemListener(this);
        
        // Display area
        display = new JTextArea(10, 30);
        display.setEditable(false);
        
        // components ઉમેરો
        add(new JLabel("કોર્સ પસંદ કરો:"));
        add(java); add(python); add(cpp); add(web);
        add(new JScrollPane(display));
        
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }
    
    public void itemStateChanged(ItemEvent e) {
        String courses = "પસંદ કરેલ કોર્સ:\n";
        if(java.isSelected()) courses += "- Java Programming\n";
        if(python.isSelected()) courses += "- Python Programming\n";
        if(cpp.isSelected()) courses += "- C++ Programming\n";
        if(web.isSelected()) courses += "- Web Development\n";
        display.setText(courses);
    }
    
    public static void main(String[] args) {
        new CourseSelection();
    }
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class TrafficSignal extends JFrame implements ItemListener {
    JRadioButton red, green, yellow;
    ButtonGroup group;
    JPanel signalPanel;
    
    public TrafficSignal() {
        setTitle("Traffic Signal સિમ્યુલેટર");
        setLayout(new BorderLayout());
        
        // radio buttons બનાવો
        red = new JRadioButton("લાલ");
        green = new JRadioButton("લીલો"); 
        yellow = new JRadioButton("પીળો");
        
        // radio buttons ને group કરો
        group = new ButtonGroup();
        group.add(red); group.add(green); group.add(yellow);
        
        // listeners ઉમેરો
        red.addItemListener(this);
        green.addItemListener(this);
        yellow.addItemListener(this);
        
        // Signal display panel
        signalPanel = new JPanel() {
            public void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.BLACK);
                g.fillRect(50, 50, 100, 200);
                
                // વર્તુળો દોરો
                g.setColor(red.isSelected() ? Color.RED : Color.GRAY);
                g.fillOval(65, 65, 70, 70);
                
                g.setColor(yellow.isSelected() ? Color.YELLOW : Color.GRAY);
                g.fillOval(65, 105, 70, 70);
                
                g.setColor(green.isSelected() ? Color.GREEN : Color.GRAY);
                g.fillOval(65, 145, 70, 70);
            }
        };
        
        JPanel controlPanel = new JPanel();
        controlPanel.add(red); controlPanel.add(yellow); controlPanel.add(green);
        
        add(controlPanel, BorderLayout.SOUTH);
        add(signalPanel, BorderLayout.CENTER);
        
        setSize(300, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }
    
    public void itemStateChanged(ItemEvent e) {
        signalPanel.repaint();
    }
    
    public static void main(String[] args) {
        new TrafficSignal();
    }
}

import java.sql.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class StudentRecordDisplay extends JFrame {
    JTable table;
    DefaultTableModel model;
    
    public StudentRecordDisplay() {
        setTitle("વિદ્યાર્થી રેકોર્ડ્સ");
        
        // table model બનાવો
        String[] columns = {"Enroll No", "Name", "Address", "Mobile", "Email"};
        model = new DefaultTableModel(columns, 0);
        table = new JTable(model);
        
        // ડેટા લોડ કરો
        loadStudentData();
        
        add(new JScrollPane(table));
        setSize(600, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }
    
    private void loadStudentData() {
        try {
            // ડેટાબેઝ કનેક્શન
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection con = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/university", "root", "password");
            
            // query execute કરો
            Statement stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM StuRec");
            
            // table માં ડેટા ઉમેરો
            while(rs.next()) {
                String[] row = {
                    rs.getString("enrollno"),
                    rs.getString("name"),
                    rs.getString("address"),
                    rs.getString("mobile"),
                    rs.getString("email")
                };
                model.addRow(row);
            }
            
            con.close();
        } catch(Exception e) {
            JOptionPane.showMessageDialog(this, "Error: " + e.getMessage());
        }
    }
    
    public static void main(String[] args) {
        new StudentRecordDisplay();
    }
}

CREATE TABLE StuRec (
    enrollno VARCHAR(20) PRIMARY KEY,
    name VARCHAR(50),
    address VARCHAR(100),
    mobile VARCHAR(15),
    email VARCHAR(50)
);

setLayout(new BorderLayout());
add(new JButton("ઉત્તર"), BorderLayout.NORTH);
add(new JButton("મધ્ય"), BorderLayout.CENTER);

import javax.persistence.*;

@Entity
@Table(name = "employees")
public class Employee {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    
    private String name;
    private int age;
    private double salary;
    private String department;
    
    // Constructors, getters, setters
    public Employee() {}
    
    public Employee(String name, int age, double salary, String dept) {
        this.name = name;
        this.age = age;
        this.salary = salary;
        this.department = dept;
    }
    
    // Getters અને Setters
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }
    
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    
    // ... અન્ય getters/setters
}

import org.hibernate.*;
import org.hibernate.cfg.Configuration;

public class EmployeeCRUD {
    private SessionFactory factory;
    
    public EmployeeCRUD() {
        factory = new Configuration()
                    .configure("hibernate.cfg.xml")
                    .addAnnotatedClass(Employee.class)
                    .buildSessionFactory();
    }
    
    // CREATE
    public void saveEmployee(Employee emp) {
        Session session = factory.openSession();
        Transaction tx = session.beginTransaction();
        session.save(emp);
        tx.commit();
        session.close();
    }
    
    // READ
    public Employee getEmployee(int id) {
        Session session = factory.openSession();
        Employee emp = session.get(Employee.class, id);
        session.close();
        return emp;
    }
    
    // UPDATE
    public void updateEmployee(Employee emp) {
        Session session = factory.openSession();
        Transaction tx = session.beginTransaction();
        session.update(emp);
        tx.commit();
        session.close();
    }
    
    // DELETE
    public void deleteEmployee(int id) {
        Session session = factory.openSession();
        Transaction tx = session.beginTransaction();
        Employee emp = session.get(Employee.class, id);
        session.delete(emp);
        tx.commit();
        session.close();
    }
}

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class CounterServlet extends HttpServlet {
    private int counter;
    
    public void init() throws ServletException {
        String initialValue = getInitParameter("initialCount");
        counter = Integer.parseInt(initialValue);
    }
    
    protected void doGet(HttpServletRequest request, 
                        HttpServletResponse response) 
                        throws ServletException, IOException {
        
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        
        synchronized(this) {
            counter++;
        }
        
        out.println("<html><body>");
        out.println("<h2>પેજ Access કાઉન્ટર</h2>");
        out.println("<p>આ પેજ " + counter + " વખત access કરવામાં આવ્યું છે</p>");
        out.println("<p><a href='CounterServlet'>Refresh</a></p>");
        out.println("</body></html>");
        
        out.close();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
    <servlet>
        <servlet-name>CounterServlet</servlet-name>
        <servlet-class>CounterServlet</servlet-class>
        <init-param>
            <param-name>initialCount</param-name>
            <param-value>0</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>CounterServlet</servlet-name>
        <url-pattern>/counter</url-pattern>
    </servlet-mapping>
</web-app>

public class ConfigServlet extends HttpServlet {
    String databaseURL, username;
    
    public void init() throws ServletException {
        ServletConfig config = getServletConfig();
        databaseURL = config.getInitParameter("dbURL");
        username = config.getInitParameter("dbUser");
    }
    
    protected void doGet(HttpServletRequest request, 
                        HttpServletResponse response) 
                        throws ServletException, IOException {
        
        PrintWriter out = response.getWriter();
        out.println("Database URL: " + databaseURL);
        out.println("Username: " + username);
    }
}

<servlet>
    <servlet-name>ConfigServlet</servlet-name>
    <servlet-class>ConfigServlet</servlet-class>
    <init-param>
        <param-name>dbURL</param-name>
        <param-value>jdbc:mysql://localhost:3306/test</param-value>
    </init-param>
    <init-param>
        <param-name>dbUser</param-name>
        <param-value>root</param-value>
    </init-param>
</servlet>

<!DOCTYPE html>
<html>
<head>
    <title>વિષય પસંદગી</title>
</head>
<body>
    <h2>વિષય કોડ પસંદ કરો</h2>
    <form action="SubjectServlet" method="get">
        <select name="subjectCode">
            <option value="">વિષય પસંદ કરો</option>
            <option value="4351603">4351603</option>
            <option value="4351604">4351604</option>
            <option value="4351605">4351605</option>
        </select>
        <input type="submit" value="વિષયનું નામ મેળવો">
    </form>
</body>
</html>

import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class SubjectServlet extends HttpServlet {
    
    protected void doGet(HttpServletRequest request, 
                        HttpServletResponse response) 
                        throws ServletException, IOException {
        
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        
        String subjectCode = request.getParameter("subjectCode");
        String subjectName = "";
        
        if(subjectCode != null && !subjectCode.equals("")) {
            try {
                Class.forName("com.mysql.cj.jdbc.Driver");
                Connection con = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/university", "root", "password");
                
                PreparedStatement ps = con.prepareStatement(
                    "SELECT subject_name FROM subjects WHERE subject_code = ?");
                ps.setString(1, subjectCode);
                
                ResultSet rs = ps.executeQuery();
                if(rs.next()) {
                    subjectName = rs.getString("subject_name");
                }
                
                con.close();
            } catch(Exception e) {
                subjectName = "Error: " + e.getMessage();
            }
        }
        
        out.println("<html><body>");
        out.println("<h2>વિષયની માહિતી</h2>");
        if(!subjectName.equals("")) {
            out.println("<p>વિષય કોડ: " + subjectCode + "</p>");
            out.println("<p>વિષયનું નામ: " + subjectName + "</p>");
        } else {
            out.println("<p>કૃપા કરીને વિષય કોડ પસંદ કરો</p>");
        }
        out.println("<p><a href='index.html'>પાછા જાઓ</a></p>");
        out.println("</body></html>");
    }
}

CREATE TABLE subjects (
    subject_code VARCHAR(10) PRIMARY KEY,
    subject_name VARCHAR(100)
);

INSERT INTO subjects VALUES 
('4351603', 'Advanced Java Programming'),
('4351604', 'Web Technology'),
('4351605', 'Database Management System');

<!DOCTYPE html>
<html>
<head>
    <title>વિદ્યાર્થી હાજરી</title>
</head>
<body>
    <h2>વિદ્યાર્થી હાજરી તપાસો</h2>
    <form action="attendanceCheck.jsp" method="post">
        <table>
            <tr>
                <td>Enrollment નંબર:</td>
                <td><input type="text" name="enrollNo" required></td>
            </tr>
            <tr>
                <td>મહિનો:</td>
                <td>
                    <select name="month" required>
                        <option value="">મહિનો પસંદ કરો</option>
                        <option value="January">જાન્યુઆરી</option>
                        <option value="February">ફેબ્રુઆરી</option>
                        <option value="March">માર્ચ</option>
                    </select>
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <input type="submit" value="હાજરી તપાસો">
                </td>
            </tr>
        </table>
    </form>
</body>
</html>

CREATE TABLE students (
    enroll_no VARCHAR(20) PRIMARY KEY,
    name VARCHAR(50)
);

CREATE TABLE subjects (
    subject_code VARCHAR(10) PRIMARY KEY,
    subject_name VARCHAR(100)
);

CREATE TABLE attendance (
    id INT AUTO_INCREMENT PRIMARY KEY,
    enroll_no VARCHAR(20),
    subject_code VARCHAR(10),
    month VARCHAR(15),
    total_classes INT,
    attended_classes INT,
    FOREIGN KEY (enroll_no) REFERENCES students(enroll_no),
    FOREIGN KEY (subject_code) REFERENCES subjects(subject_code)
);

<!DOCTYPE html>
<html>
<head>
    <title>વિદ્યાર્થી ગ્રેડ કેલ્ક્યુલેટર</title>
    <style>
        table { margin: auto; border-collapse: collapse; }
        td { padding: 10px; }
        input[type="number"] { width: 100px; }
        input[type="submit"] { padding: 10px 20px; }
    </style>
</head>
<body>
    <h2 style="text-align: center;">વિદ્યાર્થી ગ્રેડ કેલ્ક્યુલેટર</h2>
    <form action="gradeCalculator.jsp" method="post">
        <table border="1">
            <tr>
                <td>વિદ્યાર્થીનું નામ:</td>
                <td><input type="text" name="studentName" required></td>
            </tr>
            <tr>
                <td>વિષય 1 ગુણ:</td>
                <td><input type="number" name="marks1" min="0" max="100" required></td>
            </tr>
            <tr>
                <td>વિષય 2 ગુણ:</td>
                <td><input type="number" name="marks2" min="0" max="100" required></td>
            </tr>
            <tr>
                <td>વિષય 3 ગુણ:</td>
                <td><input type="number" name="marks3" min="0" max="100" required></td>
            </tr>
            <tr>
                <td>વિષય 4 ગુણ:</td>
                <td><input type="number" name="marks4" min="0" max="100" required></td>
            </tr>
            <tr>
                <td>વિષય 5 ગુણ:</td>
                <td><input type="number" name="marks5" min="0" max="100" required></td>
            </tr>
            <tr>
                <td colspan="2" style="text-align: center;">
                    <input type="submit" value="ગ્રેડ કેલ્ક્યુલેટ કરો">
                </td>
            </tr>
        </table>
    </form>
</body>
</html>

public class Student {
    private String enrollNo;
    private String name;
    private double marks;
    
    // Business logic
    public String calculateGrade() {
        if(marks >= 90) return "A";
        else if(marks >= 80) return "B";
        else if(marks >= 70) return "C";
        else return "D";
    }
}

@WebServlet("/student")
public class StudentController extends HttpServlet {
    protected void doGet(HttpServletRequest request, 
                        HttpServletResponse response) {
        String action = request.getParameter("action");
        
        if("view".equals(action)) {
            // model માંથી ડેટા મેળવો
            Student student = studentService.getStudent(enrollNo);
            // request scope માં set કરો
            request.setAttribute("student", student);
            // view માં forward કરો
            RequestDispatcher rd = request.getRequestDispatcher("student.jsp");
            rd.forward(request, response);
        }
    }
}

// DI વિના - Tight coupling
public class StudentService {
    private StudentRepository repo = new StudentRepository(); // Hard dependency
    
    public Student getStudent(String id) {
        return repo.findById(id);
    }
}

// DI સાથે - Loose coupling
public class StudentService {
    private StudentRepository repo;
    
    // Constructor injection
    public StudentService(StudentRepository repo) {
        this.repo = repo;
    }
    
    public Student getStudent(String id) {
        return repo.findById(id);
    }
}

@Service
public class StudentService {
    @Autowired
    private StudentRepository repository;
    
    public List<Student> getAllStudents() {
        return repository.findAll();
    }
}

@Repository
public class StudentRepository {
    public List<Student> findAll() {
        // Database operations
        return studentList;
    }
}

// આ એક POJO છે
public class Student {
    private String enrollNo;
    private String name;
    private int age;
    private String course;
    
    // Default constructor
    public Student() {}
    
    // Parameterized constructor
    public Student(String enrollNo, String name, int age, String course) {
        this.enrollNo = enrollNo;
        this.name = name;
        this.age = age;
        this.course = course;
    }
    
    // Getters અને Setters
    public String getEnrollNo() {
        return enrollNo;
    }
    
    public void setEnrollNo(String enrollNo) {
        this.enrollNo = enrollNo;
    }
    
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    // Business methods
    public boolean isEligibleForExam() {
        return age >= 18;
    }
    
    public String getStudentInfo() {
        return "Student: " + name + " (" + enrollNo + "), Course: " + course;
    }
}

// POJO Entity
public class Student {
    private String name;
    private String email;
    // constructors, getters, setters
}

// Service with DI
@Service
public class StudentService {
    @Autowired
    private StudentRepository repository;
    
    public Student createStudent(String name, String email) {
        Student student = new Student(); // POJO creation
        student.setName(name);
        student.setEmail(email);
        return repository.save(student);
    }
}