MVCPatternDemo.java

package DesignPatterns;

class Student
{
    private String rollNo;
    private String name;
    public String getRollNo()
    {
        return rollNo;
    }
    public void setRollNo(String rollNo)
    {
        this.rollNo = rollNo;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }
}

class StudentView
{
    public void printStudentDetails(String studentName, String studentRollNo)
    {
        System.out.println("Student: ");
        System.out.println("Name: " + studentName);
        System.out.println("Roll No: " + studentRollNo);
    }
}

class StudentController
{
    private Student model;
    private StudentView view;
    public StudentController(Student model, StudentView view)
    {
        this.model = model;
        this.view = view;
    }

    public void setStudentName(String name)
    {
        model.setName(name);
    }

    public String getStudentName()
    {
        return model.getName();
    }

    public void setStudentRollNo(String rollNo)
    {
        model.setRollNo(rollNo);
    }

    public String getStudentRollNo()
    {
        return model.getRollNo();
    }
    public void updateView()
    {
        view.printStudentDetails(model.getName(), model.getRollNo());
    }
}

class MVCPatternDemo
{
    public static void main(String[] args)
    {
        Student model = retriveStudentFromDatabase();
        StudentView view = new StudentView();
        StudentController controller = new StudentController(model, view);
        controller.updateView();
        controller.setStudentName("Vikram Sharma");
        controller.updateView();
    }
    private static Student retriveStudentFromDatabase()
    {
        Student student = new Student();
        student.setName("Lokesh Sharma");
        student.setRollNo("1557");
        return student;
    }
}