The Java Concepts

Declaration of enum in java :- (1) Enums declaration can be done outside a class not inside a method.         -----------------------------------------                 👇Click here👇           Complete Java tutorials        ------------------------------------------ (2) The first line inside the enum should be a list of constants and then other things like methods, variables and constructors (3) According to Java naming convention, it is recommended that we name constant with all capital letters.  Example:—     enum Color           {             RED, GREEN, BLUE;            }        public class Test            {         //Driver methods       public static void main (String[ ]args)  ...

Enum in java:– An enum is a special "class" that represents a group of constant ( Unchangeable variable like final variable)       To create enum, use the enum keywords (instead of a class or interface), and separate the constants with a comma Note that they should be in uppercase letters: Enumeration serve the purpose of representing a group of named constants in a programming language.       Enums are used when we know all possible value at compile time, such as a choice on a menu, rounding modes, command line flag, etc. It is not necessary that the set of constants in an enums type stay fixed for all.                  enums are represented using enums data type. Java enums are more powerful than C/C++ enums. In Java we can also add variable, methods and constructors to it. The main objective of enum is to define our data types ( Enumerated Data types ) RELATED LINKS🔗 DECLARATION OF ENUM IN JAVA IMPO...

  Advantages of OOP:  Object-Oriented Programming have the following advantages over conventional procedural and other approaches :  1. OOP provides a clear modular structure for programs. This makes it good for defining abstract data types where implementation details are hidden and clear interfaces are defined.  2. OOP makes it easy to maintain and modify existing code as new objects can be created with small changes to existing ones. 3. OOP provides a good framework for code libraries where software components can be easily taken and modified by the programmer. This is particularly useful for developing graphical user interfaces applications. Learn Java - The Java concepts Relative Search:- Introduction Structured Vs Object Oriented Programming   Top-Down and Bottom-up Approaches Advantages of top-down programming  Disadvantages of top-down programming Why Object Oriented Approach and Features of object oriented programming ?  Advantages of...

  Why Object Oriented Approach ?  A major factor in the invention of object oriented approach was to overcome some of the problems encountered with the procedural approach. In OOP, data is treated as a critical element and it is not allowed to flow freely. OOP bounds data closely with the functions that operate on it and protects it from accidental modification from outside world. OOP allows decomposition of a problem into a number of èntities called objects and then builds data and functions around these objects. A major advantage of OOP is code reusability.   Some important features of object oriented programming are as follows :  1. Emphasis is on data rather than procedure.  2. Programs are divided into several objects.  3. Data is hidden and can not be accessed by external functions. 4. Objects can communicate with each other through functions.  5. New data and functions can be easily added whenever necessary. 6. It follows the bottom-up approach....

  Advantages of top-down programming : Programming team stays focused on the goal.  Everyone knows his or her job.  By the time the programming starts there are no questions.  Code is easier to follow, since it is written methodically and with purpose.  Disadvantages of top-down programming: Top-down approach may complicate testing, since nothing executable will exist until the end of the project.  You have to provide a clear goal description in advance because all decisions depend on it. Learn Java — The Java Concepts Relative topics — Introduction Structured Vs Object Oriented Programming   Top-Down and Bottom-up Approaches Advantages of top-down programming  Disadvantages of top-down programming Why Object Oriented Approach and Features of object oriented programming ? 

  Top-Down and Bottom-up Approaches:  Top-down approach is a programming style. It is the base of traditional procedural languages, in which design begins by specifying complex pieces and then dividing them repeatedly into smaller pieces. The result of this breakdown is that the components are very specific and it becomes easier to write programs. This is the exact opposite of the bottom-up approach which is common in object oriented languages such as C++ and Java.  For writing a program using top-down approach we write the main procedure first. This main procedure contains names of all the major functions it will need. Then we look at these functions as individual procedure and the process is repeated again. These divided sub-procedures will eventually perform actions that are very simple and their coding can be done easily and concisely. When all the various sub-procedures have been coded, we have the complete solution. Learn Java... The Java Concepts Relative topics– I...

  Introduction :  Object oriented programming (OOP) is the soul of Java. All Java programs follow the object oriented methodology. OOP is so important to Java that we must understand its basic principles before we can write even a simple Java program. Therefore, we will begin our study with a discussion of the theoretical concepts of Object Oriented Programming.  Structured Vs Object Oriented Programming :  As we know, every program consists of two elements :code and data. The code reflects "what is happening" and the data reflects "who is getting affected". A programmer can conceptually organize his program around its data. That is, some programs are written around code or around "what is happening" and others are written around "who is being affected." These are the two ways to construct our program. The first way is called the structured programming and supports process-oriented model. This approach treats a program as a series of linear step...