What is Java
Java is an evergreen programming language for developing various kinds of the application over the past decade. This programming language suits best for developing the various kinds of applications across the globe. The importance of this programming language has not decreased even though many programming languages arose after that. Have you ever thought of why this programming language has gained importance? Do you know why other programming languages could not replace this? Read the complete article to get the answer to all these questions.
Let us start our discussion with java definition
Java is a programming language and computing platform released by the sun microsystem in 1995. It is object-oriented programming similar to C++. This language is free to access and can run on all platforms. We can say this programming language as :
a)concurrent: It can execute multiple statements instead of executing sequentially
b)Class-based: It executes the statements in different classes through objects.
c)Independent: It is an independent programming language that follows the logic of “ Write once Run Anywhere”. i.e the compiled code is responsible to run on all platforms that support java.
History of Java:
Java was originally developed by James gosling with his colleagues at Sun MicroSystems during the early 1990s. This programming language is similar to C and C++. The name java was later selected after enough brainstorming and is based on the name of the expression bean. Java 1.0 is the first version released in the year 1995. Time being oracle owned this sun microsystem. From that time, this programming language is releasing various versions by adding new features to the latest versions. As on March 2020, its latest version is java
You people can get the latest version Java download online.
What is the Java platform?
Java platform is a software platform that is different from traditional platforms like Windows, Mac, Linux, and Solaris. This platform runs on the top of the hardware of the latter platforms. These platforms go through virtual machines that convert the byte into native code and thus make the program to run anywhere. Hence, the user does not require specific machine compilers for the java code to run. This programming language is different from its platform. Moreover, this programming language is responsible to build java applications. The code written in this programming language is developed and run with the help of an existing collection of tools and programs collectively known as the JAVA platform. This programming platform consists of JDK, JVM, and JRE. The four platforms of this programming language are:
c)J Micro Edition(ME)
Among these, SE Platforms were capable of building stand alone applications, World wide web (Internet) uses JEE. And Micro Edition(ME) suits well for small applications
Get the practical exposure of these platforms from live experts at Java Online Training
Components of Java:
Java Virtual Machine (JVM):
JVM is an abstract machine. It is a specification that provides the run-time environment in which byte code can be executed. It usually follows three notations:
It is a document that described the implementation of JVM. It is provided by the sun and other companies
It is a program that meets the requirements of JVM specification.
- Run time Instance:
An instance of JVM is created, whenever you write command on the command prompt and run the class.
Java Run time Environment(JRE):
JRE refers to the Java Run time Environment in which byte code executes. It implements JVM and provided all the class libraries and other support files that JVM uses at run time. Hence JRE is a software package that contains all the necessary libraries to run the program. It is an implementation of JVM that physically exists.
Java Development Kit:
It is a tool that is responsible to compile, document, and package the software programs. Here the JDK completely uses JRE which contains tools for programmers. Besides, this Development Kit is available free of charge. This JDK includes JRE, interpreter/loader, compiler, an archiver, document generators, and other tools to develop an application. Hence in some cases, it also is known as JRE+ and other tools.
Features of Java:
This programming language is simple and easy to learn when compared to other programming languages. Because this programming language makes the application development much easier by removing all the complexities such as pointers, operator overloading in C++, and so on.
This programming language is a platform-independent language. Hence application written on one platform can be easily ported to the other platform.
Everything in this programming language is considered to be object-oriented. This feature enables the same state, behavior when operations were performed using these objects.
All the code is converted into byte code after compilation that is not readable by a human. Moreover, as mentioned above, this programming language does not use any explicit pointer and runs the programs inside the sandbox to prevent illegal activities from untrusted sources. Hence it enables to develop virus-free tamper-free applications/ systems
This programming language is capable of adopting the evolving environment that supports dynamic memory allocation. Hence by we can reduce the memory wastage and can increase the application performance.
This programming language allows users to create distributed applications. Using Remote Method Invocation(RMI), a program is capable of invoking a method of another program across the network. Moreover, it allows the program to access the files from any machine using the internet.
Hence likewise, many excellent features make to stand on the top of the programming languages. Get all features with live use cases at java online course. So due to these excellent features, this programming suits best in different areas like mobile, Desktop GUI, Enterprise. Scientific, gaming applications. Besides it also opted as the programming languages in big data, business, distributed, and cloud-based applications.
Hence with this, I hope you people have got an overview of this programming language. In my next articles of the blog, I’ll be sharing the details of this programming application in various areas. Meanwhile, have a glance at out java interview questions and get placed in your dream company