Introduction to Java programming essentials Written by: Ibidunni Ridwan
By: Ibidunni Ridwan Aljebrah
Tags: Developer, Programming Languages, Java, Programming, Communication

Java was first released in 1995 by Sun Microsystem Inc. High-level



languages were first translated into instructions for a specific type of



computer but Java was given some enhancement over some of the



foremost Object-Oriented Programming languages like C.

Java

compiler instead turns code into Bytecode which will be interpreted by a

software called Java runtime environment(JRE) or the Java virtual

machine(JVM).

The virtual computer that helps in the translation of the Bytecode to the

host computer makes the Java code platform-independent.

Java can be

written once and run anywhere (WORA) that is, it can be written the same

way for many platforms (operating system). According to Oracle, Java has



one ofthe biggest global communities. Over 2 billion devices are

implemented with Java.

To be a Java programmer one needs to understand its basics which are the essentials needed to dive into Java as a programming language, core Java

is the needed basic to get the general-purpose programming concepts that

give a solid back ground in your programming career. Core Java refers to a



collection of libraries used in implementing the programming language

itself.

Some of the major concepts that one needs to understand in core Java are;

Concept of classes: this is the ‘house’ of every code you write in Java.

Methods: these are the services render by every ‘house’ (class) in Java.

Data types: are the kinds of variables you intend to store in computer

memory.

Object: is the instance of a class, that is a representation of a class from

another class that is used to access the services rendered by that class.

Programming structure: this is divided into the sequential structure, which

executes an action on a linear path, the repetitive or iterative structure,

which are used to go over some series of actions for a particular condition,

and the selection structure which deals with choices to be made while

executing an event.

Array and ArrayList: are used in storing multiple data of the same data type.

It is used in creating tables of values for complex computation like Matrix.

Object-oriented programming concepts(OOP): this is a major concept that

makes our Java code flexible and reusable. It involves topics like

inheritance, which deals with classes absorbing or inheriting (extending)

the public features of its superclass. Another concept is polymorphism

which helps in processing our subclasses generally.

Java is a very versatile language that has a crucial role in preparing you as

a programmer. It goes in-depth to show you what is happening behind the

scene. Java should be considered as a language to learn because of its

uniqueness like;

Speed: A well-optimized Java code is almost as fast as a low-level



language like C or C++and faster than other object-oriented languages

like Python and PHP.

Platform independent: Java is not dependent on its platform to perform

optimally. Java code written on Windows OS can be run on MacOS without

any modifications.

Popularity:Java has one of the largest communities out there and these

made Oracle create different versions of Java.

By:

Ibidunni Ridwan (aljebra school of thought)

aljebraschoolofthought@gmail.com