Introduction to Java

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Introduction to Java

Welcome, Introduction to Java programming language – JAVA is the most widely used programming language in the world. You’re already familiar with the powerful computer operations. You’ll learn Object-Oriented Programming using JAVA language. You’ll able to work and create some specific software objects. JAVA is also used in internet-based application programming software for devices that communicate over a network.

According to a study by Gartner, mobile devices will continue to outpace PCs as users’ primary computing devices; an estimated 1.96 billion smartphones and 388 million tablets will be shipped in 2015—8.7 times the number of PCs.3 By 2018, the mobile applications (apps) market is expected to reach $92 billion.4 This is creating significant career opportunities for people who program mobile applications, many of which are programmed in Java.

Some devices that use JAVA language.

Airplane systems ATMs Automobile infotainment systems
Credit cards CT scanners Desktop computers
Home appliances
Mobile phones Printers
Smartphones Tablets Televisions

Java was developed by James Gosling, Chris Warth, Mike Sheridan, Ed Frank, and Patrick Naughton at Sun Microsystems, Inc. in 1991. It took 18 months to develop the JAVA Language first working version. JAVA programming language was initially called “Oak” but was renamed “Java” in 1995. Between the initial implementation of Oak in the fall of 1992 and the public announcement of Java in the spring of 1995, many more people contributed to the design and evolution of the JAVA programming language.

Java Standard Edition:

The latest release of the Java Standard Edition is Java SE 8. Java Standard Edition 8 (Java SE 8) was published just 17 years after the first edition. Java Standard Edition 8 (Jave SE 8) applicable to develop desktop and server applications.

Java supported three programming paradigms, procedural programming (POP), object-oriented programming (OOP) and generic programming. Java SE 8 add functional programming. We’ll show you how to use functional programming in Java SE 8 to write programs faster and more concisely.

Java Enterprise Edition:

Java also used in a broad spectrum of applications that it has two more editions. The Java Enterprise Edition (Java EE) is developing large-scale, distributed networking applications and web-based applications. In the past, most computer applications ran on “standalone” computers (computers that were not networked with each other). Today’s applications can be written which can communicate among the world’s computers via the Internet and the web.

Java Micro Edition:

The Java Micro Edition (Java ME) a subset of Java Standard Edition (Java SE). In Java ME we can develop applications like embedded devices, such as smartwatches, television set-top boxes, MP3 players, smart meters (for monitoring electric energy usage) and many more related resources.

Some Java features:

  • Object-Oriented:

This is the main feature of Java. In Java, everything is an Object. A computer programming language where everything based on an object called Object-Oriented language.

  • Multithreaded:

In the multithread feature, a programmer can write programs that can perform many tasks simultaneously. This Java feature allows the programmer to build interactive applications that can run faster and smoother.

  • Simple:

Java is very simple and easy to learn. If you have the basic knowledge of OOP (Object Oriented Programming), it would be easy to learn.

  • Secure:

Security is the one main module of computer applications. In Java’s secure feature programmer can develop virus-free and more secure applications than other languages.

  • Architecture Neutral:

Java compiler builds an architecture-neutral object file format, which makes the compiled code executable on many processors, with the help of a Java runtime system.

  • Portable:

Java provides a portability feature, which helps the programmer and user to move one application, one platform to another platform.

  • Distributed:

Java helps the designed distributed environment of the internet.

  • High Performance:

With the use of Just-In-Time compilers, Java enables the programmer to write high-performance applications.


OOP Principles in Java


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