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format file jar

What is a jar file and how do I open a jar file?

A Java Archive file is also called a JAR file, and these Java Archive files are integrated with compilation specifications proprietary to Oracle. These Java Archive files are also implemented with encoding specifications also proprietary to Oracle for the JAR format. JRE (Java Runtime Environment) uses the data stored in these JAR files as reference data or an application library of a program developed using Java and intended to run in platforms where the Java Runtime Environment is enabled. The content of a JAR file may include framework code developed to initialize and run Java programs. These JAR files can also be created as standalone applications for mobile phones, tablet computers and desktop or laptop computers installed with the Java Runtime Environment. Program resources may also be included in the content of a JAR file, and a manifest file can optionally be entered in a JAR file. Some Web browsers are integrated with support for the Java Runtime Environment and can thereby be used to access the data stored in these JAR files. The Java Virtual Machine is also known as the Java Runtime Environment. Sun Microsystems was the original developer of the JAR format before it was acquired by Oracle.

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Detail jar file extension information:
File Type: jar
File Format: Java Archive File
Primary Association: Program Execution Files
Mime Type: application/java-archive, application/x-compressed, application/x-java-applet, application/x-java-applet;version=1.1, application/x-java-bean, application/x-java-bean;version=1.1, application/x-java-vm/java-applet, application/x-java-vm/java-beans