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Are there any built-in methods I can use to allow users to extract a file from the currently running JAR and save it on their disk?
Thanks in advance.
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The jar-file argument is the filename (or path and filename) of the JAR file from which to extract files. archived-file(s) is an optional argument consisting of a space-separated list of the files to be extracted from the archive. If this argument is not present, the Jar tool will extract all the files in the archive.
Type in jar xf followed by a space followed by the name of the JAR file. This is the command to extract a JAR file. For example, to extract a JAR file called "minecraft", you would type in jar xf minecraft. jar .
Hi, Jar files are archive files that contains of a lot of different java classes (files). You can use winzip/winrar to open the jar files and you can see those java classes in jar files. Typically you can use a Java decompiler to decompile the class file and look into the source code.
File file = new File("newname.ext");
if (!file.exists()) {
InputStream link = (getClass().getResourceAsStream("/path/resources/filename.ext"));
Files.copy(link, file.getAbsoluteFile().toPath());
}
Use getResourceAsStream (docs), you can do whatever you want with it after that.
For a two-liner you could use one of the Commons IO copy methods.
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