You can also rename any .jar file as .zip and use standard zip tools to examine the contents of the jar ;-)
From: Thomas Wolf <tjw...@gmail.com> Sent: Tuesday, 17 September, 2019 16:26 To: Judi Rastall <j...@rastall.com> Cc: NetBeans Mailing <users@netbeans.apache.org> Subject: Re: Loading and Displaying Images The java development kit comes with the 'jar' command (the example of how to do it uses that; on Unix machines the "diff" command lets you view differences between two files). from a command-prompt, you would type "jar tf theNameOfYourWorkingJarFile" to see a listing of all the classes in that jar file. Hope that helps, Tom On Tue, Sep 17, 2019 at 11:20 AM Judi Rastall <j...@rastall.com<mailto:j...@rastall.com>> wrote: Tom, How do I look at the contents of a jar file? Is there a jar file viewer or decompiler? Judi On 17/09/2019 16:03, Thomas Wolf wrote: Judi, I would compare the contents of your jar files - the one that works vs. the one that now doesn't work. i.e. jar tf workginJarFile.jar > l1; jar tf nonWorkingJarFile.jar > l2; diff l1 l2. This might help you see if, for whatever reason, the images didn't make it into your current jar file. Good luck. Tom On Tue, Sep 17, 2019 at 9:59 AM Judi Rastall <j...@rastall.com<mailto:j...@rastall.com>> wrote: I am working on an application that needs to load various images and there seem to be a million different ways to do this in the examples I have found online. The method I have found to work most reliably until recently is this: LogoLabel.setIcon(new javax.swing.ImageIcon(getClass().getResource("Images/WF5_200.gif"))); This is part of the setting up of a JLabel within a JPanel and it runs perfectly well within NetBeans. I thought I was doing quite well and have managed to call other functions from JButtons in the main app. At various times I have built (compiled) the project to a jar file and have tested it to see that it runs OK under the runtime engine. So far so good. However, in recent weeks the jar file has stopped running. It builds with no error messages but if I run it from my desktop shortcut the cursor shows "waiting" for a couple of seconds and then reverts to normal and nothing else happens. If I run it from the command line within the \dist\ directory I can see an "Unknown Source" error message followed by a pointer to the line of code above that loads the gif file. It appears to me that the compile/build function cannot interpret the file location. I have tried placing a copy of the image in the same directory as the source java file (and removing the images\ path) but still no joy. Now here's the strange thing. Until the end of August it would build and run OK. I was able to retrieve the previous jar file from my backup and it still runs perfectly well. I cannot understand what has changed and would be grateful for any suggestions as to where I might look to solve this very frustrating problem. With thanks, Judi R -- tjw...@gmail.com<mailto:tjw...@gmail.com> http://landofwolf.blogspot.com/ -- tjw...@gmail.com<mailto:tjw...@gmail.com> http://landofwolf.blogspot.com/
