java - What exactly does a jar file contain? - Stack Overflow A jar file is basically a zip file containing class files and potentially other resources (and metadata about the jar itself) It's hard to compare C to Java really, as Java byte code maintains a lot more metadata than most binary formats - but the class file is compiled code instead of source code
java - Running JAR file on Windows - Stack Overflow I have a JAR file named helloworld jar In order to run it, I'm executing the following command in a command-line window: java -jar helloworld jar This works fine, but how do I execute it with dou