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What is Java Development Kit (JDK)? Brief Information About Java Development Kit

Written by Parth Patel · 7 min read >
Java Development Kit

The Java Development Kit, often known as JDK, is the base upon which all programs designed to run on the Java platform are constructed. The Java Development Kit (JDK) contains several tools and utilities to carry out various tasks. These tasks include compiling source code into bytecode, packaging applications, spinning up Java virtual machines (JVMs), and managing the runtime environment in which Java applications are executed. Hire the best Java development company in India, USA.

What precisely is the JDK?

The Java Development Kit (JDK) is a software package containing various tools and utilities that make it possible to develop applications that build for any standard Java platform. These platforms include Java Platform, Standard Edition (Java SE), Java Platform, Micro Edition (Java ME), and Java Platform, Enterprise Edition. The JDK makes it possible to develop, package, monitor, and deploy applications that build for these platforms (Java EE).

What is Java Programming Language?

The Java programming language is a high-level, class-based, object-oriented language. It supports the basic data types int, char, double, and float. Consequently, it is not an existing object-oriented programming language. Java has a unique capability that allows application developers to Write Once and Run Anywhere (WORA), meaning that generated Java code can run on any system that accepts Java without recompilation.

The Java Virtual Machine (JVM) is an engine that offers a runtime environment for Java Code and applications. It translates Java into machine language. JVM belongs to the Java Runtime Environment (JRE). JVM is referred to be Java Magic since it supports WORA.

All source code in the Java programming language is first written in plain text files with the the.java suffix. The java compiler-java subsequently compiles these source files into .class files. A .class file does not contain processor-native code; instead, it includes bytecodes, the machine language of the JVM. The Java launcher utility then executes the program using a JVM instance. Due to the availability of the JVM on several operating systems, the duplicate .class files may operate on Microsoft Windows, Solaris OS, Linux, and Mac OS.

The platform is known as Java

In the past, it would have been accurate to argue that the JDK solely targeted Java programming language. However, this is no longer the case. However, Java 7 made it possible for peripheral programming languages like Groovy, Clojure, and Kotlin to convert their programs into Java bytecode and run them on a computer using the Java Runtime Environment (JRE) (JRE). Consequently, in its current iteration, the Java platform comprises not just the Java programming language but also a wide range of additional peripheral languages that utilize the JDK tools and operate on the Java runtime.

Also, check out the 10 Best Java Tools for Development, Code Coverage, Profiler, and Review

JDK components, tools, and utilities

The JDK’s bin directory contains several features and tools that facilitate program development.

Javac is one of the most used JDK tools.

This program compiles Java source code into Java bytecode.

rmic:

This application generates skeletons and stubs for Remote Method Invocation (RMI).

Jar:

This compression tool combines several files into a single Java ARchive (JAR) file. The jar utility employs the same compression method as the most used zip utilities.

Javadoc:

This tool can evaluate the names of classes and the methods included inside a class and consume specific annotations to generate Java API documentation.

wsgen:

This creates numerous artifacts needed by Java API for XML Web Services (JAX-WS) (JAX-WS).

javap:

This program disassembles class files and generates information on a specified component’s methods, properties, and attributes.

Java Mission Control (JMC), Java Flight Recorder (JFR), and VisualVM are among the tools included in the JDK for examining the runtime behavior of a JVM.

Difference between the JDK and JVM

Another tool goes by the name java that may be found in the JDK bin directory. It invokes the java utility and creates a JVM, which employs a just-in-time, or JIT, compiler to transform bytecode into machine code. Any Java application with a runnable primary method may be converted into a software program with the help of this tool, which will do it automatically.

The source code of a Java program is converted into bytecode once the application is compiled. The Java source code is translated into low-level machine code through a bytecode translation process. Converting Java bytecode to low-level computer instructions on the fly is the critical step in making a Java program compatible with several platforms and independent of the underlying hardware.

JDK vs. JRE comparison

There are two different paths available to use when downloading and installing Java. The first choice is to download and install the Java Runtime Environment (JRE), and the second is to download and install the Java Development Kit (JDK). On the Java Virtual Machine (JVM) supplied by the Java Runtime Environment (JRE), a Java application developed in Java does not need any additional capabilities other than the standard set of Java libraries, and a straightforward execution environment will execute effectively.

On the other hand, if any further functionality is needed, such as the capability to compile Java source code on the fly or the generation of an authentication certificate, the JDK will be essential. The JDK comes with its own JRE, but in addition to those basic facilities, it also offers a wide range of additional features and capabilities. Have Java development challenges to address? Hire Java Developers from us!

Jenkins, Maven, IBM WebSphere, JMeter, Tomcat, and Apache Karaf are some products that call for the installation of the JDK rather than the JRE.

Java Standard Edition and the JDK

The Java Development Kit (JDK) includes all of the libraries necessary to run programs in Java Standard Edition. Packages for utilities, networking, input/output (I/O), cryptography, and XML processing are included in the standard application programming interfaces (APIs). The JDK also supports developing user interfaces (UIs) using the Abstract Window Toolkit (AWT), Swing, and JavaFX packages. This functionality is part of the Standard Edition.

JDK libraries

The Java EE platform, built on Java SE, has several components as part of its architecture. The Java Development Kit (JDK) is the foundation upon which all subsequent application programming interfaces (APIs), platform frameworks, and frameworks are constructed. Java developers have access to a fundamental collection of libraries, utilities, and tools collectively referred to as the JDK.

However, support for components such as servlets, Java Server Pages (JSP), and Enterprise JavaBeans is not included in the JDK (EJB). Similarly, the Java Development Kit (JDK) does not inherently facilitate the development of microdevices using Java ME. However, Java ME builds on top of the JDK and uses all of the capabilities and tools that are made accessible by the JDK. Learn about the benefits of hiring java development company for your business.

Peripheral languages

There has been consistent growth in the number of people using peripheral programming languages like Groovy, Clojure, Scala, and Kotlin. All of these languages can run on the JDK, but they provide a variety of capabilities that allow them to circumvent the Java language’s restrictions. Groovy, for instance, has powerful scripting tools in its package. Both Scala and Clojure provide solutions to the many scalability problems that the Java application experiences. Additionally, the development of Android applications is made much easier with Kotlin. These programming languages all execute on a Java Virtual Machine (JVM) and make use of the standard libraries as well as other capabilities that are native to the Java platform.

The Java Development Kit (JDK) has been around for over 20 years. The JDK will undoubtedly continue to be a significant force in the field of information technology for the foreseeable future. Need Java web development services? Contact us now!

FAQs:

What is the JDK?

Java’s JDK acronym stands for Java Development Kit. It consists of software development tools and accompanying libraries, as well as the Java Runtime Environment (JRE) and Java Virtual Machine (JVM) (JVM).

How many versions of JDK are there?

Java 19, or JDK 19, is the most recent version of Java, published on September 20, 2022. JDK 17 is the most recent version of the Java SE platform Long Term Support (LTS). JDK 19 is a standard update released (about 8 years of support from Oracle).

How do I download Java SE Development Kit for JDK?

Java SE Development Kit Installation on Windows

  • – Open the Java SE Downloads page.
  • – Select the Download JDK:
  • – Accept the conditions and download the suitable version. Not sure which Windows version
    you’re running?
  • – Open the executable file and execute the installation using the default settings.

How to install the JDK?

Double-click the JDK 13 icon or file name in the download location to start the JDK installer. Follow
the installation wizard’s recommended instructions. Delete the downloaded file to restore disk space
after the installation is complete.

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