Quote:the debug doesn't work with me because of (storage issues)
That's unlikely - the debugger isn't usually that large, and that app is a pretty trivial size.
But ... there are online debuggers, for example: Online Java Debugger - online editor
] which will allow you to see what is happening with your code.
Put a breakpoint on the first line in the function, and run your code through the debugger. Then look at your code, and at your data and work out what should happen manually. Then single step each line checking that what you expected to happen is exactly what did. When it isn't, that's when you have a problem, and you can back-track (or run it again and look more closely) to find out why.
Sorry, but we can't do that for you - time for you to learn a new (and very, very useful) skill: debugging!