The f option indicates that the JAR file to update is specified on the command line.
jar-file is the existing JAR file that's to be updated.
We'll cover the basics of using the JAR tool before delving a bit deeper into some more extended offerings of the tool later in this article.
In this command: The u option indicates that you want to update an existing JAR file.
Simply drag and drop your new class file to the JAR using 7-Zip or Winzip.
You can even modify a JAR file that is included in a WAR file using the parent folder icon, and click Ok when 7zip detects that the inside file has been modified and then replace the file in the folder, handy if you are updating the class a lot while debugging 2) you can extract the jar replace the file then the jar it up again 3) Open the jar with 7 zip and drag and drop your new class in to copy over the old one An alternative is not to replace the .class file in the jar file.
Instead put it into a new jar file and ensure that it appears earlier on your classpath than the original jar file.
Not sure I would recommend this for production software but for development it is quick and easy.
So, I go to command line as usual, type a few lines of code, and then I do this command: jar files are also zip files, so the feature packed zip tool can operate on them.
I want to update that image with a new version of that image, which is also called
Inside this folder called images, I have an image called
Secondly, you could probably use an expanded jar if this is web based. if it isn't web based (single client) why not just load the image from ./images/
TL; DR; Do it the easy way, if you're swapping on a filesystem use the filesystem.1) I'd generally use Ant or another build tool to build the Jars lazily (only when resources are updated) 2) Since Zip brings little benefit to most media types (at least sound, video & images), I'd also generally put them in a separate Jar with no compression.