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Some of these packages include the following packages that are fundamental for the design of Java applications, package versioning, management and monitoring. Language and utility libraries:В Included with JRE are Java.lang.

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Java Naming and Directory Interface (JNDI):В A programming interface and directory service that lets clients create portable applications that can fetch information from databases using naming conventions.

Java Database Connectivity (JDBC) API:В Provides tools for developers to write applications with access to remote relationship databases, flat files and spreadsheets.

Java IDL:В Uses Common Object Request Brokerage Architecture (CORBA) to support distributed objects written in Java programming language.

Some of these libraries include the following:

Integration libraries: Java Runtime Environment provides several integration libraries and class libraries to assist developers in creating seamless data connections between their applications and services.

Swing:В Another lightweight GUI that uses a rich set of widgets to offer flexible, user-friendly customizations.

Abstract Window Toolkit (AWT):В A Graphical User Interface (GUI) used to create objects, buttons, scroll bars and windows.

Developers can create rich user interfaces, special effects, games and animations.

Java 2D:В An application programming interface (API) used for drawing two-dimensional graphics in Java language.

Some of these toolkits include the following:

Development toolkits:В JRE also contains development tools designed to help developers improve their user interface.

Deployment solutions: Included as part of the JRE installation are deployment technologies like Java Web Start and Java Plugin that simplify the activation of applications and provide advanced support for future Java updates.

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JRE componentsД«esides the Java Virtual Machine, JRE is composed of a variety of other supporting software tools and features to get the most out of your Java applications. If they are only installing (and not developing or compiling code), then only JRE is needed.

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If a programmer would like to execute a Java program using the Java command, they should install JRE. JRE is also used in JDB (Java Debugging). JRE uses heap space for dynamic memory allocation for Java objects. Java Runtime Environment, or JRE, is a set of software tools responsible for execution of the Java program or application on your system. Execution Engine contains an interpreter, compiler and garbage collection area.

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Runtime Data Areas contain method areas, PC registers, stack areas and threads.

Class Loader Subsystem is responsible for loading, linking and initializing a Java class file (i.e., вЂњJava fileвЂќ), otherwise known as dynamic class loading.

JVM consists of three main components or subsystems:

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Native methods are used to move native code written in other languages into a Java application. These applications are called native applications and can often be written in other languages. JNI is a programming framework that enables Java code running in JVM to communicate with (i.e., to call and be called by) applications associated with a piece of hardware and specific operating system platform. Java Native Interface (JNI) is often referred to in connection with JVM. In addition, JVM can run programs written in other programming languages that have been translated to Java bytecode. It is also platform-dependent and performs many functions, including memory management and security. JVM is specifically responsible for converting bytecode to machine-specific code and is necessary in both JDK and JRE. It is known as the interpreter or the core of Java programming language because it executes Java programming. Java Virtual Machine, or JVM, loads, verifies and executes Java bytecode. Read on and find out how Java Virtual Machine (JVM), Java Runtime Environment (JRE) and Java Development Kit (JDK) each play a role in the Java development process, their relationship to each other and the differences that set them apart. It is primarily used for back-end development projects, game development and desktop and mobile computing. Java is one of the most popular programming languages used in developing environments today. How do JVM, JRE and JDK relate and work together in the Java development process?

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