Loading an old file into an updated program
I am relatively new to Java and am currently working on a simple rental property management program. I already have a working version of the program, but have since went on to make some updates unfortunately I can no longer open up files that were created in the old version of the program. I have since added some methods to a base class that is being saved off and that seems to be the issue, but I need to be able to do such things in order to better my program. Any suggestions on how to open the old files?
Thanks in advance,