Introduction


Today, especially in the wake of terrible pandemics, the internet and cell phones have become indispensable parts of our daily life. We perform practically all of our daily activities on our phones. We used to go to shopping centers, wait in line at banks, and book our travel through travel agencies. But thanks to cell phones, we can do all of this from the comfort of our homes. Java, a high-level programming language, has made all of this feasible.

What is Java?


Java is a programming language that may be used to make the software compatible with a wide range of operating systems. It is a compiled and interpreted two-stage programming language. It does not, however, gather directly into an executable file, which makes it different from the majority of other compiled languages.
The code is first compiled in Java and then translated into a binary form called Java Byte Code. Finally, JBC is compiled and interpreted into the native language needed to run in the target operating environment. This contrasting behavior is a significant advantage for developers because they can write code once and run it anywhere.
This feature has become a popular concept, much sought after by developers; it is known as the "Write Once, Run Anywhere" (WORA) philosophy. The WORA philosophy became popular as Sun Microsystems' slogan in 1995.

History of Java


Java was initially developed by James Gosling with his colleagues at Sun Microsystems in the early 1990s. It was originally called the 'Oak' project with an implementation similar to C and C++. After extensive thought, the name Java was finally selected; it is derived from the name of the espresso bean. The initial version of Java, 1.0, was introduced in 1995 under the motto "write once, execute anywhere." Later, Oracle bought Sun Microsystems. From there, there was no turning back. The most recent Java version is Java 12, which was released in March 2019.

What is Based on Java?


Java is built on top of C and C++. Sun Microsystems created the first Java compiler, which was written in C using some C++ libraries. The Java interpreter uses a compiler to translate Java files into bitcode format. The Java Virtual Machine (JVM) is the runtime environment that executes Java code.

Java properties
Java offers many attractive features:-
  • Platform independent language
  • A rich standard library to make coding easier. You can create an entire standalone application using Java.
  • Java supports automatic memory allocation and deallocation (so-called garbage collection).
  • It offers excellent performance because Java supports multithreading and concurrency, making it a highly interactive and responsive language.
  • Safe and simple

Our Learners Also Read:10 Best Java Frameworks You Should Know



What is the Purpose of Java?


Web consoles, GUIs, web and mobile applications, game development, embedded devices, and desktop programs all make extensive use of Java. Java is additionally used to create software for gadgets. It is utilized in a variety of electronic equipment, including televisions, air conditioners, washing machines, and mobile devices in addition to computers and mobile devices. The applications of Java in real life are listed below.


Mobile Application Development

Since the invention of smartphones, mobile application development has increased rapidly. The three most well-known smartphone app stores currently have millions of mobile apps available.
Java is a fantastic option for creating intricate applications with several interfaces because of its very nature. Because it is so effective at establishing connections between various devices, it also functions well as a Programming Language for mobile apps.


Artificial Intelligence

Software with artificial intelligence can manage intricate automatic calculations. Many businesses, like credit organizations, banking, Amazon's Echo, and other smart gadgets, to mention a few, use AI software.


Big Data

For a wide range of objectives, the big data industry collects and reports data. Many firms utilize data analytics to track users, contacts, products, sales, and other things. Java also makes it simple to develop visualizations that show this data in a manner that is simple to comprehend and absorb.
This benefit's usefulness makes it a great fit for big data because it makes working with vast amounts of data easier.


Software Development

According to the WORA concept, Java is a fantastic choice for software development since it is adaptable enough to operate in a variety of various operating conditions. Additionally, programmers can simultaneously construct software for numerous systems by writing the code just once and running it everywhere.
Any software created in Java may instantly execute on any device with the Java Virtual Machine installed due to the nature of compilation and interpretation. Java continues to rule various industries in large part because of this capability, and you can be sure that Java is here to stay.


Internet of Things

The linking of physical items that need to communicate and share data is referred to as the "Internet of Things," a term that is, to put it mildly, imprecise. Device communication became increasingly necessary and was implemented in a number of ways. The requirement for connecting equipment is illustrated by instances like aeroplanes and traffic controllers.
Fortunately, the original intent of creating Java as a programming language was to connect devices precisely this way, so it's perfect for the job.


Web Development

It is essential to remember that, even though much has changed over the years, Java has never ceased to be a staple in the web development industry. In Web Development, it is still often used for database management and other purposes.
Java is still used by developers to build interactive web pages that significantly improve user experience.

Java Components


The Java programming language is made up of three primary parts:-

JVM: The Java Virtual Machine, sometimes known as JVM, is a platform-independent Java component that offers a setting for Java programs to run in. As a result, the JVM loads the code, checks it for accuracy, runs it, and delivers the runtime environment.

JRE: Also known as the Java Runtime Environment, or JRE, is a framework that enables the execution of Java files. The JVM, Java class libraries, and Java class loader are all included in this software bundle.

JDK: A software development environment used to create Java programs and applets, the Java Development Kit (JDK) is a superset of the JRE. The JDK contains a private JVM and several other resources to complete the development of a Java application.

Many beginners also confuse Java and Javascript. Let's understand the difference between the two.

What is the Difference Between Java and JavaScript?


Due to the similarity in naming, there has been some confusion between Java and JavaScript over the years. But the fact is that they are as different as the words ham and hamster. They only have one or two similarities: both are used for software programming, and both have a name consisting of the word Java.
Apart from these two points, the truth is that the two languages are very different, with one standing above the others. JavaScript is only an interpreted language, while Java is a language that is first compiled and then interpreted into a functional executable. This separation may seem like a minor difference, but the truth is that it changes the way programmers approach the development task.
When diving deep into the Java programming world, there are a number of distinctive aspects of Java to keep in mind. Let's look at some key aspects and talk about how they relate to you and your programming requirements before we wrap up this essay.
Java often has a simpler user interface than many of its competitors because it simplifies pointer management and operator overloading.

Conclusion


Almost all of the things we use on a daily basis are now connected to Java. The Java programming language is still one of the best in the business, and employment opportunities are in great demand.