Java OOP

    

        OOP sands for Object-Oriented Programming 

 

Procedural Programming -: Writing procedures or methods that performs operations on data.

Object-Oriented Programming -: Creating objects that contains both data & methods


Advantages of object-oriented programming over procedural programming -:

  • faster & easier to execute
  • provide the clear structure for the programs
  • keep DRY "Don't repeat yourself" principle, and makes the code easier to maintain, modify & debug.
  • possible to create less reusable application with less code & shorter development time

 

Classes & Objects 

Classes and objects are the two main aspects of object-oriented programming. 

Look following examples to get idea about classes & objects -:

ex 1-:

class - fruit

objects -: Apple, Banana, Mango


ex2-:

class-: Animal

objects -: Dog, Cat, Monkey


class is a template for object. object is an instance of a class.

When the individual objects are created, they inherit all the variables and methods from the class.

 

Like to introduce more details about classes and objects in the next post

Comments

Post a Comment

Popular posts from this blog

Create your first Java program

Image
 INTRODUCTION  More than 3 billion devices run Java. Java is used to develop apps for Google's Android OS, various Desktop Applications, such as media players, antivirus programs, Web Applications, Enterprise Applications (i.e. banking), and many more! "Java Programs are platform independent. Because when the Java program runs in a particular machine it is sent to java compiler, which converts this code into intermediate code called bytecode. This bytecode is sent to Java virtual machine (JVM) which resides in the RAM of any operating system. JVM recognizes the platform it is on and converts the bytecodes into native machine code. Hence java is called platform independent language." WRITE YOUR FIRST JAVA PROGRAM     you can use any Java development kit to run your java program (ex-: Geany, eclipse or any other) In Java, each application has an entry point, or a starting point, which is a method called main. Along with main, the keywords public and static will also be...
Read more

Java Variables

 Variables are containers for storing data values. In Java, there are different types of variable. String - stores text. String values are surrounded by double quotes int - stores integers (whole numbers), without decimals float - stores floating point numbers, with decimals, such as 9.99 or -1.99 char - stores single characters, such as 'a' or 'B'. Char values are surrounded by single quotes boolean - stores values with two states(true or false)   Variable Declaration  Syntax -: type  name_of_variable = value;      type -:  String/ int/ float/ char/ boolean      name_of_variable -: such as x,x1,y      equal sign used to assign values to the variable.            ex -: String name= "mala"                    int age=24;                    float decnum=5.99f; ...
Read more