Try reinstalling both MRJ 2.2.5 & then 2.2.6 if it will let you.
MRJ 2.2.6 for OS 9.2.2
Mac OS Runtime for Java 2.2.6: Information and Download
MRJ 2.2.5 for OS 8.1-9.2
Mac OS Runtime for Java 2.2.5: Information and Download
Something else i would do is run your utility programs. Such as Disk First Aid, Norton Utilities, DiskWarrior & TechTool if you have them. Defragment your drive. Another option is to reinstall OS 9. Then move across any files such as preferences & extensions from the old one to the new one.