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Java

Java is an Object Oriented as well as Platform Independent programming language.

JAVA FEATURES

  • Compiled and Interpreter
  • Platform independent
  • Object Oriented
  • Secure
  • Distributed
  • Simple

JAVA  Architecture

Step-1: Create a java source code with .java extension

Step-2: Compile the source code using java compiler, which will create bytecode file with .class extension.

Step-3: Class loader reads both the user defined and library class into the memory for execution

Step-4: Bytecode verifier validates all the bytecodes are valid and do not violate Java’s security restrictions.

Step-5: JVM reads bytecode and translate into machine code for execution. While execution of the program the code will interact to the operating system and hardware.

JVM-Java Virtual Machine

What is Platform?

We can define a platform as the sum of hardware and software, that provides the environment to run the program. We can realistically say that a platform is the computer and the operating system running on it. The operating system can be Windows, Mac, Linux, or any of many others.

Platform Independence

If a computer program executes at every operating system then such type of piece of code should be treated as Platform-Independent code. And the programming language in which this code has been written should be known as platform Independent Programming Language.

If a code compile once and runs at any Operating system then this could be treated as Platform Independent code and the programming language in which this code has been written should be known as Platform Independent Programming language. Write Once Runs Anywhere (WORA)

How its happens?

JVM for Each and Every OS

Future Scope of Java Programmers

Following points show the immense opportunities available for Java Programmers in India:-

  • India’s $150 billion IT services outsourcing industry is adapting to the changes that are fast setting in because of automation and higher adoption of digital technologies.
  • People’s Popularity of Programming Language index, which ranks languages according to popularity. It is based on tutorial searches, says Python, JavaScript, R, and Swift are gaining attraction in India though Java and PHP still retain the largest share of search.
  • There is one clear trend from the multiple surveys on the most widely used programming language worldwide: Java and JavaScript still rule the coding world.
  • Government projects like Digital India and Demonetization surely will give rise to demand for Java Programmers in every company going digital.

Average Salary for Java Programmers

Percentage of Job Listings

Language Popularity

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