![]() Indicates the files in the JAR should be extracted The Java utility to create and open JAR files To extract the contents of a JAR file to the filesystem with the Java JAR utility, just issue the following command: jar xf jar-file-name Open a JAR Java command JAR option This utility can both create JAR files and open JAR files. When you install Java, the Java JAR utility is installed as well. This will search for the main-class in the JAR file and run it. With Java installed, run the JAR file on the command line with the following command: java -jar jarfilename.jar To run a JAR file you must first install Java on your computer. Sometimes when a person uses the term “open a JAR file” they really mean they want to run a JAR file. A Java JAR file uses a standard compression algorithm used by programs like 7-Zip and Gzip.
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