Tutorials

49 articles

Java OOP – Java Packages

A package is a group of classes, interfaces and other packages. We can organize our classes and interfaces using packages. In java there are two types of packages. Built-in packages User defined packages Built – In Packages In java we can see packages that defined already. They are known as Built-in packages. Let’s see an […]

August 15, 2020

JAVA OOP

Java OOP – Polymorphism

Polymorphism is ability of a message to be displayed in more than one form. Simply, this allows us to perform single action in different ways. We can perform polymorphism in java by method overriding and method overloading. In last two articles we discussed about Inheritance (Part I and Part II). You can visit the article […]

August 10, 2020

JAVA OOP

Java OOP – Inheritance (Part II)

In the last article we discussed about 6 cases from Inheritance (Part I), one of the main concepts in OOP. Make sure that you have knowledge on those cases before reading of the today article. Let’s go to the rest of the Interface lesson. Case VII When a sub class object is initiated in the […]

August 10, 2020

JAVA OOP

Java OOP -Inheritance (Part I)

According to the Oracle, In the Java language, classes can be derived from other classes, thereby inheriting fields and methods from those classes is called Inheritance. A class that is derived from another class is called a sub class (also a derived class, extended class, or child class). The class from which the subclass is derived is called a super class (also a base class or a parent class). […]

August 9, 2020

JAVA OOP

Java OOP – Static variables and methods

All the static members are created in the template and we can access them without an object. Non-static variables and methods cannot access without an object. Static members are common for all the instances(objects) of the class but non-static members are separate for each instance of class. Today we are going to talk about static […]

August 8, 2020

JAVA OOP

Java OOP – Constructor

A constructor is a block of code that initializes newly created object. This is not a method because this doesn’t have a return type. But before you learn about constructors, make sure that you know about the methods. You can visit the articles of the Java Basics (Java Methods) tutorial. When we create a constructor, […]

August 7, 2020

JAVA OOP

Java OOP – Objects/Classes/Attributes

In the last article we discussed about an Introduction on Java OOP. Today’s article is on the topics Objects, Classes and Attributes. Objects In the real world you can see many objects such as animals, humans, and vehicles etc. All these have a state and a behavior. Software Objects also have a state and a […]

August 6, 2020

JAVA OOP

Java OOP – Introduction

Before the using of concept Object Oriented Programming (OOP), people used the structural programming methodology. In structural programming, coding effort is very high and also complex. So to reduce the coding effort and complexity, James Gosling created the concept of Object Oriented Programming. Object oriented system design is another aspect to come up with the […]

August 4, 2020

JAVA Basics

Part 17 – Java Arrays (2D arrays)

2D (two-dimensional) array is a multidimensional array. A multidimensional array is an array of arrays. 3D array also a multidimensional array, but rarely using. Today we are going to learn about 2D arrays. Before we learn about 2D arrays, make sure you know about java arrays. You can follow the link given below to study […]

August 2, 2020

JAVA Basics

Part 16 – Java Arrays (Declaration)

An array is a collection of variables from the same type. Arrays are using for multiple purposes. There are several types of cases we can see in an array declaration. Let’s see what are those with simple examples. Case I There are 2 steps to make an array. Array address is making from the array […]

August 1, 2020

JAVA Basics

Part 15 – Java Methods (Rules for methods)

In the last 2 articles of Java methods you learned about the types of java methods and method-call stack. Before you going to the today’s topic (rules for methods) you can go to the link given below to take look at on the last 2 articles. Part 13 – Java Methods (Introduction) Today we are […]

July 31, 2020

JAVA Basics

Part 14 – Java Methods (Method-call stack)

Hi guys, welcome back. In the last article we discussed about the types of java methods. you can go to the link given below to take look at on the last article. Today we are going to learn about the method- call stack under the topic java methods. Let’s identify the method-call stack by step […]

July 30, 2020