What Are the Components of Java Programming Language
  • Cyber Success
  • August 27, 2021
  • Java

What Are the Components of Java Programming Language?

Java is ubiquitous. It is evident right from your watch, desktop to your favorite online games. The reason behind this omnipresence is the objects of the Java language. They have overpowered every domain, right from banking, gaming, online shopping to the stock market. Its versatility and free access add to its popularity and gains humongous favoritism among all the developers.

If you are planning to gain fame by learning Java, it is imperative to know all about it. One of its key aspects is the components of the Java programming language. These components help in developing varied Java solutions. These components are boon to convert a written Java program into machine language for the computer to understand and execute, which is called compiling. So, let’s understand the basic components of the Java program.

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Main Components of Java Programming Language

1. Java Development Kit (JDK)

JDK plays a vital role when developing Java applications and programs. It is a software development environment equipped with tools like a compiler, documentation generator, interpreter, and many others. The compiler primarily helps in converting the Java code into byte code.

JDK is a platform-specific software, but it can be used on various Operating Systems, including Windows, Mac, and Linux. However, you will need to have distinct JDK installers for each Operating System. Apart from this, there are an array of tools to write Java programs, which are further executed by JRE.

Components included in JDK:

  • jConsole
  • jar
  • javap
  • jarSigner
  • jstack
  • javaws
  • keytool
  • policytool

2. Java Virtual Machine (JVM)

Java applications are primarily called Write once Run Anywhere (WORA) because of their ability to run on any platform. Amid this, JVM offers a runtime environment for executing Java Code or applications, further converting Java bytecode into machine language. Usually, in other programming languages, the compiler produces machine code for a specific system, but the Java compiler initiates for JVM.

Besides being a part of the Java Run Environment (JRE), JVM boasts an array of tools, frameworks, and libraries. As one of the key components of the Java platform, JVM executes source code with platform independence, which is why you can run a Java program on any platform without any restrictions. With all this, JVM also has a Just-in-Time (JIT) compiler to convert Java source code into low-level machine language, which explains the fast speed of Java applications.

Components included in JVM:

  • ClassLoader Subsystem
  • Loading
  • Initialization
  • Linking
  • Stack
  • Runtime Data Area, which includes heap area, method area, etc.

3. Java Runtime Environment (JRE)

Equipped with loader class, class libraries, and JVM, JRE helps in running other software. To explain in basic terminology, JRE is responsible to run a Java program. All-in-all, JRE is installed on the computer system that takes hold of Java code, blends it with the desired libraries, and allows JVM to execute it. A programmer needs JDK, and if you are one, then you will need JDK. However, JRE’s role is limited to running Java programs as it doesn’t flaunt tools related to development like compiler or debugger. But if you wish to run Java applets, it is imperative to have JRE installed in your system. As it is platform-dependent, you have to download and install JRE that is compatible with your operating system.

Apart from this, JRE has class libraries, JVM, and utilizes various package classes like swing, math, util, lang, and runtime libraries.

Java components list in JRE:

  • Code libraries, resource files as well as property settings
  • DLL files
  • When it comes to extension, Java component example includes files related to locale specification like localedata.jar
  • Security management files like java. security
  • Applet support classes
  • True Type font files

Through this article, we tried highlighting the main components of the Java programming language. We are positive that you found this informative. However, if you have any queries and wish to gain an in-depth understanding of the components of the Java programming language, then you must enroll in an efficient Java course in Pune.

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