Illustrate an example to define a student class, JAVA Programming

Assignment Help:

Task - Defining a Student class

The below illustration will explain how to write a class. We want to write a "Student" class which

- should be able to store the below characteristics of student

- Roll No

- Name

- Provide default, parameterized and copy constructors

- Provide standard getters/setters (discuss shortly) for instance variables

- Make sure, roll no has never assigned a negative value i.e. ensuring correct state of object

- Provide print method capable of printing student object on console

Getters / Setters

Attributes of a class are usually taken as private or protected. So to access them outside of a class, a convention is followed knows  as  getters  &  setters.  These  are usually public  methods.  Words set and get are used prior to name  of  an attribute.  Another  significant purpose  for  writing  getter  & setters to control the values assigned to an attribute.

Student Class Code

// File Student.java

public class Student {

private String name;

private int rollNo;

// Standard Setters

public void setName (String name) {

this.name = name;

}

 

// Note the masking of class level variable rollNo

public void setRollNo (int rollNo) {

if (rollNo > 0) {

this.rollNo = rollNo;

}else {

this.rollNo = 100;

}

}

// Standard Getters

public String getName ( ) {

return name;

}

public int getRollNo ( ) {

return rollNo;

}

 

// Default Constructor public Student() {

name = "not set";

rollNo = 100;

}

 

// parameterized Constructor for a new student

public Student(String name, int rollNo) {

setName(name); //call to setter of name

setRollNo(rollNo); //call to setter of rollNo

}

 

// Copy Constructor for a new student

public Student(Student s) {

name = s.name;

rollNo = s.rollNo;

}

 

// method used to display method on console

 

public void print () {

System.out.print("Student name: " +name);

System.out.println(", roll no: " +rollNo);

}

} // end of class

 


Related Discussions:- Illustrate an example to define a student class

Describe interfaces in java langauge, Describe Interfaces in java langauge?...

Describe Interfaces in java langauge? Interfaces are the further level of abstraction. An interface is like a class along with nothing but abstract methods and final, static fi

Inheritance, Your task for this assignment is to define multiple classes vi...

Your task for this assignment is to define multiple classes via inheritance. Your classes should implement various "snacks" including "M&Ms", "Popcorn", etc. To begin, create an a

How to display validation errors on jsp page, tag shows all the errors. i...

tag shows all the errors. iterates over ActionErrors request attribute.

Different messaging paradigms jms supports, What are the different messagin...

What are the different messaging paradigms JMS supports? Ans) Publish and Subscribe i.e. pub/suc and Point to Point i.e. p2p.

Explain instance variable, What will be the default values of all the eleme...

What will be the default values of all the elements of an array explained as an instance variable? If the array is an array of primitive types, then all the elements of the arr

Performance of a java application, How can I improve the performance of a ...

How can I improve the performance of a java application , describe the java optimization techniques?

Write a java applet using swing components, The project is optional. It is ...

The project is optional. It is worth at least 7 bonus points beyond overall 100 points of this course. The grading will be on a pass/fail basis. Write a Java application (not ap

Preemptive scheduling and time slicing, In pre-emptive scheduling, the high...

In pre-emptive scheduling, the highest priority task implements until it enters the waiting or dead states or a higher priority task comes into existence. In time slicing, a tas

Need cocos2d-x developer - puzzle game, cocos2d-x puzzle game for kids P...

cocos2d-x puzzle game for kids Project Description: I am seeking a skilled, reliable, and not very expensive cocos2d-x developer (with experience with iOS, Android, and prefe

Determine the phase loading- java program development, Determine the phase ...

Determine the phase Loading- Java Program Development In phase 3, the program must first be placed in memory before it can be executed. This is done by the class loader, whic

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd