What is the abbreviation of the running environment of java program?

The running environment of the java program is referred to as "JRE". JRE is a collection of environments necessary to run JAVA programs, including JVM standard implementation and Java core class libraries. JRE consists of two parts: 1. Java Runtime Environment, which is a Java platform on which applications can be run, tested, and transmitted; 2. Java Plug-in, which allows Java Applets and JavaBean components to run in browsers that use JRE.

#The operating environment of this tutorial: windows7 system, java8 version, Dell G3 computer.

The running environment of the java program is referred to as "JRE".

JRE Introduction

JRE is the abbreviation of Java Runtime Environment, which refers to the Java running environment and is a product of Sun. A collection of environments necessary to run JAVA programs, including JVM standard implementation and Java core class libraries.

JRE (including Java Plug-in) is a Sun product, including two parts: Java Runtime Environment and Java Plug-in.

• Java Runtime Environment is a Java platform on which applications can be run, tested and delivered. It does not include development tools (JDK) - compilers, debuggers and other tools. JRE requires auxiliary software--the Java Plug-in--in order to run applets in the browser.

• Java Plug-in software allows Java Applets and JavaBean components to run in browsers that use Sun's Java Runtime Environment, rather than in browsers that use the default Java Runtime Environment. run. Java Plug-in is available for Netscape Navigator and Microsoft Internet Explorer.

J2RE is the Java2 Runtime Environment, which is the Java runtime environment. It just emphasizes that it matches the Java2 platform, sometimes referred to as JRE. If you just need to run a Java program or Applet, download and install it.

JRE is one of three related components for developing and running Java programs. The other two components are as follows:

• #The Java Development Kit (JDK) is a set of tools for developing Java applications. Developers choose a JDK by Java version and package or revision (Java Enterprise Edition (Java EE), Java Special Edition (Java SE), or Java Mobile Edition (Java ME)). Every JDK always includes a compatible JRE because running Java programs is part of the process of developing Java programs.

• The Java Virtual Machine (JVM) executes Java applications in real time. Every JRE includes a default JVM, but developers are free to choose other JVMs that meet their application's specific resource needs.

The JRE combines the Java code created using the JDK with the necessary libraries required to run on the JVM, and then creates a JVM instance that is used to execute the generated program. The JVM is available for multiple operating systems, and programs created using the JRE can run on all operating systems. In this way, the Java runtime environment enables Java programs to run unmodified on any operating system.

How does JRE work?

The JDK and JRE interact to create a sustainable runtime environment that can seamlessly execute Java-based applications on virtually any operating system. The following makes up the JRE runtime architecture:

• Class Loader

  The Java class loader dynamically loads everything needed to run a Java program. kind. Because Java classes are loaded into memory only when needed, the JRE uses the class loader on demand to automate this process.

• Bytecode Verifier

  Before passing Java code to the interpreter, the bytecode verifier ensures that the code is formatted and accuracy. If the code violates system integrity or access rights, the class is considered corrupt and will not be loaded.

• Interpreter

  After the bytecode is successfully loaded, the Java interpreter will create a JVM instance to support the execution of Java programs on the underlying machine. Machine execution.

What does JRE contain?

In addition to the Java Virtual Machine, the JRE includes a variety of other supporting software tools and features to help you get the most out of your Java applications.

Deployment Solutions

Deployment technologies are included with the JRE installation, such as Java Web Start and Java Plugin, which are designed to simplify application activation and provide future Java updates provide advanced support.

Development Toolkit

JRE also contains toolkits designed to help developers improve a program's user interface. Some of these toolkits include:

• Java 2D: An application programming interface (API) for drawing two-dimensional graphics in the Java language. Developers can create rich user interfaces, special effects, games, and animations.

• Abstract Window Toolkit (AWT): GUI (Graphical User Interface) for creating objects, buttons, scroll bars, and windows.

• Swing: Another lightweight GUI that provides flexible user-friendly customization using a rich set of widgets.

Integrated library

The Java runtime environment provides a number of integration libraries to help developers create seamless data connections between applications and services. Some of these libraries include:

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

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

• Java Naming and Directory Interface (JNDI): A programming interface and directory service that enables clients to create portable applications that use naming conventions to retrieve information from databases.

Language and Utility Library

JRE contains the java.lang. and java.util. packages, which are Java application design, packages Essential package required for version control, management and monitoring. Examples of packages include:

• Collection Framework: A unified architecture composed of a set of interfaces designed to improve the storage and processing of application data.

• Parallel Utilities: A powerful framework package with high-performance threading utilities.

• Preferences API: A lightweight cross-platform persistent API that supports multiple users on the same machine to define their own set of application preferences.

• Logging: Generate log reports such as security failures, configuration errors, and performance issues for further analysis.

• Java Archive (JAR): Platform-independent file format that bundles multiple files in JAR format, significantly increasing download speeds and reducing file size.

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