Introduction of Java language
Java is a general purpose computer programming language and was developed by “James Gosling” and “Patrick Naughton” at “Sun Microsystems” incorporated in 1991, later acquired by “Oracle Corporation” and released it in 1995 as a core component of Sun Microsystems’’ Java platform i.e. Java 1.0 (J2SE).
The latest released version is Java SE 8 with advancement of Java and widespread popularity; multiple configurations were built to support various types of platforms like J2EE for Enterprise application and J2ME for Mobile application. It is the only version currently supported for free by Oracle, although earlier versions are supported both by Oracle and other companies on a commercial purpose. As of 2015, Java language is one of the most popular programming languages in use particularly for client server web applications.
What is Java?
Java can be taken as a general purpose, object-oriented language that drives much of its syntax from C and C++, but it has fewer low-level facilities than either of them i.e. it is easier to use and lets you develop more robust programs.
Java is basically a programming language as well as a platform.
Programming language: It is a formal constructed language designed to communicate instructions to a machine, particularly a computer. It can be used to create programs to control the behaviour of a machine or to express algorithms.
Platform: It can be defined as any hardware or software environment in which a program runs is known as platform. Since Java has its own runtime environment (JRE) and application program interface (API), it is called as platform.
Java is intended to let application developers “write once, run anywhere” (WORA) meaning that compiled Java code can run on all platforms that supports Java language without the need of recompilation. Java applications are typically compiled to “bytecode” that run on any Java virtual machine (JVM) regardless of computer architecture.
Unfortunately, the above explanation of definition doesn’t give you much insight into Java language. The more detailed definition (based on Java’s features) of Java can be taken from Sun Microsystems is as relevant today as it was in previous decades.
Java is a simple, secure, object-oriented, class-based, platform-independent, concurrent, robust, portable, multithreaded, high-performance, distributed, interpreted, network-savvy, architecture-neutral, and dynamic programming language.
The terms in this definition can be easily understood in the section “features of Java” which will provide you a detailed description of each and every term.
Use of Java
According to given report, there are currently 9 million developers are using Java language and 3 billion devices run Java. There are various devices where Java language is currently being used and they are as following:
- Web applications such as Irctc, LinkedIn, EBay, and Google plus, etc.
- Enterprise applications such as banking applications, customer relationship management (CRM), Enterprise resource planning (ERP), etc.
- Desktop applications such as media player, antivirus, etc.
- Embedded systems.
- Smart cards.
- Robotics, etc.
Java applications can be mainly classified into four categories of applications that can be created using Java programming and they are as following:
It is an application or software that we need to install on every machine such as media players, antiviruses, etc. It is software that is not a part of some bundled software. A program that is run as a separate computer process, not an add-on of an existing process. Standalone program, a program that does not require operating system’s services to run. It is a portable application which can be run without the need for installation procedure that is why it is called as standalone application. It is also known as desktop application or window-based application. AWT and swing are used in Java to create standalone applications.
An application program that runs on remote server and creates dynamic pages and delivered over the internet through a browser interface is called web app or web application. Some of the Java technologies which are used to create web application are servlet, JSP, JSF, etc.
An enterprise application or software is a business purpose application that is used to satisfy the need of an organisation rather than individual users. Such organisations would include businesses, charities, governments, schools, clubs, etc. These applications are complex, distributed, scalable, component-based, mission-critical, etc. such as banking applications. It has the advantage of high level security, load balancing, and clustering. In Java, Enterprise Java Beans (EJB) is used to create enterprise applications.
An application that is designed to run on mobile devices such as smartphones, tablets, Personal Digital Assistance (PDA), etc. is called mobile app or application. Such devices are being sold with several apps including pre-installed apps or software such as email client, calendar, web browser, calculator, etc. Now days, android and Java ME are being used to create mobile applications.
Thank you for your patience 🙂
Features of Java
Java is featured by plenty of terms which are also known as “Java Buzzwords” and are simple & easy to understand by heart. Those features of Java which made it one of the most popular languages….more…