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affordable private tomcat web site hosting cookie.split(';'); for (var i = 0; i Download the JDK Search the Tutorials Hide the TOC Trail: Deployment Lesson: Packaging Programs in JAR Files Packaging Programs in JAR Files Using JAR Files: The Basics Creating a JAR File Viewing the Contents of a JAR File Extracting the Contents of a JAR File Updating a JAR File Running JAR-Packaged Software Working with Manifest Files: The Basics Understanding the Default Manifest Modifying a Manifest File Setting an Application's Entry Point Adding Classes to the JAR File's Classpath Setting Package Version Information Sealing Packages within a JAR File Signing and Verifying JAR Files Understanding Signing and Verification Signing JAR Files Verifying Signed JAR Files Using JAR-related APIs The JarClassLoader Class The JarRunner Class Home Page > Deployment > Packaging Programs in JAR Files « Previous • Trail • Next » Using JAR Files: The Basics JAR files are packaged with the ZIP file format, so you can use them for tasks such as lossless data compression, archiving, decompression, and archive unpacking. These tasks are among the most common uses of JAR files, and you can realize many JAR file benefits using only these basic features. Even if you want to take advantage of advanced functionality provided by the JAR file format such as electronic signing, you'll first need to become familiar with the fundamental operations. To perform basic tasks with JAR files, you use the JavaTM Archive Tool provided as part of the Java Development Kit.
affordable private tomcat web site hosting Because the Java Archive tool is invoked by using the jar command, this tutorial refers to it as 'the Jar tool'. As a synopsis and preview of some of the topics to be covered in this section, the following table summarizes common JAR file operations: Common JAR file operations OperationCommand To create a JAR file jar cf jar-file input-file(s) To view the contents of a JAR file jar tf jar-file To extract the contents of a JAR file jar xf jar-file To extract specific files from a JAR file jar xf jar-file archived-file(s) To run an application packaged as a JAR file (requires the Main-class manifest header) java -jar app.jar To invoke an applet packaged as a JAR file <applet code=AppletClassName.class archive="JarFileName.jar" width=width height=height> </applet> This section shows you how to perform the most common JAR-file operations, with examples for each of the basic features: Creating a JAR File This section shows you how to use the Jar tool to package files and directories into a JAR file.
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