CS & BCA Notes

  IMPLEMENTATION OF CLASS & OBJECTS College.java import java.io.*; public class College {             String name;             String dept;             int age;             String place;             public College(String name, String dept,int age, String place)             {                         this.name = name;                         this.dept = dept;        ...

    II BCA -  CORE PAPER 3 PROGRAMMING IN JAVA USE INTERFACES Contents: Java Interface Need for Java interface Declaring an Interface Relationship between Interface & class Declaring Interface Constants  Java Interface ·          The interface in Java is  a mechanism to achieve  abstraction that specify what a class must do  without saying anything about how the class will do it. ·          An interface can be defined as a container that stores the methods to be implemented in the code segment. ·          An interface can have methods and variables just like the class but the methods declared in interface are by default abstract. ·          The variables declared in an interface are public, static & final by default. Need for Java interface There are mainly three re...

  II BCA -  CORE PAPER 3 PROGRAMMING IN JAVA UNIT 1 DEFINE CLASS Java Class   ·         A  Java Class  is like a  wrapper or envelope  that comprises a number of Methods and Variables. ·         A class defines the properties and behavior of an object. ·         In Java class, the variables represent the properties of the object and the methods that represent the behavior of the object. ·         A Java program consists of a CLASS with some Methods & Variable. Java Class Syntax Java classes defined in the following way: class MyClass {             // fields,             // constructor, and             // method declarations   ...