A Java Programming Blog
In this article, we will see what is a global variable and how we can use this in our Java programs. In Java, all the functions and data members are declared inside a class and every declaration has to be done inside it. If we declare them outside the class, then they would not be accessible by the object of that class. Therefore, in Java, there is no such precise concept of global variables because these are described at the
Read moreAs programmers work with real-life entities, object-oriented programming allows programmers to achieve the same. Objects are used to store knowledge, data, task, state, and other different OOP tasks and methods. This article is going to explain the fundamental four pillars of object oriented programming in java. Image Source 1. Encapsulation Encapsulation is achieved when the object of the class maintains the private state. Other objects are not allowed to access these objects; despite that, the other objects can only access
Read moreInheritance is one of the pillars of the Java programming language. Learning OOP (Object Oriented Programming) without knowing and understanding the concept of Inheritance, its pros and cons are incomplete. Inheritance is a process in which a class acquires all the data members and its parent class methods. The basic idea behind it is that you create new classes based on the existing classes with additional data and methods. Example:
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class SuperHello { ..... ..... } class Sub extends SuperHello { ..... ..... } |
In the above example, there are two classes SuperHello
Read moreTo find out whether constructor returns any value or not, let’s learn about a constructor? In simple terms, the constructor is a special method, which is used to initialize an instance of a class. This special method differs from the actual methods of classes. The name of a constructor is always similar to the name of the class. Below is an example of a constructor:
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public class Complex { //This is the constructor Complex(){ } .. } |
How Constructor Work? Consider an example:
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public class Student { String name; //Constructor Student(){ this.name = "Hello constructor"; } public static void main(String[] args) { Student obj = new Student(); System.out.println(obj.name); } } |
OUTPUT: Hello constructor The object is built
Read moreJava is an Object-Oriented Programming language. Therefore, the data and the member functions in Java are present in the classes. The classes in Java contain both constructors and methods as well. Let’s see in detail about methods and constructors and their differences. Constructor The purpose of constructors is to initialize the objects, which are the instances of the classes. Similar to the methods, the constructors also hold statement blocks that get executed during the run time of the program. Constructors
Read moreWhen you listen to the name Constructor, then what comes to your mind? Something like making or creating or building something. A constructor is also similar, it initializes an object immediately after its creation. You can compare constructors with the methods. They are similar while differing in some aspects. Constructors don’t have any return type, unlike the methods. Also, the Constructor name must be the same as the class name, which is not possible when declaring methods.
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public class ClassConstructor { //This is the constructor ClassConstructor() { } .... } |
Rules for
Read moreThe term Programming paradigm means the methodology for writing program codes. In general, two paradigms govern how you can construct a program. These two ways are: a process-oriented model an object-oriented model Many programming languages support both the paradigms like python. Python allows the users to code using both process-oriented and object-oriented methodologies. However, Java is exclusively object-oriented. What is Object Oriented Paradigm The object-oriented programming paradigm (OOP) has a completely different approach to problem-solving. It does not focus on the problem
Read moreHello everyone, In this tutorial, we are going to learn about Hybrid inheritance in Java. Before diving right into hybrid inheritance let us first quickly look at some other types are inheritance commonly used in Java. As you may know, Java typically uses four types of inheritance: Single Inheritance Multilevel Inheritance Hierarchical Inheritance Multiple Inheritance Single Inheritance: When a class extends another one class we call it Single Inheritance. Here A is called the parent class and B is derived
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