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You need to think about what exactly you're trying to do.

Write a test program that programatically adds a few Accounts with hardcoded names to an ArrayList of Accounts. Then write a function that...

Your ArrayList only holds Accounts:

ArrayList<Account>account = new ArrayList<Account>();

You never add any Strings to that ArrayList. In fact, that would cause a compiler error. Yet you check...

You're only ever adding in Accounts to your ArrayList. It will never contain a String.

I would recommend creating a test program: can you write a simple main method that initializes an ArrayList, adds 10 Objects to it, then prints the ArrayList out? Which part of that simple program...

I would recommend creating a test program: can you write a simple main method that initializes an ArrayList, adds 10 Objects to it, then prints the ArrayList out? Which part of that simple program...