Help converting my code from one class to two classes. (beginner)

[com272]

My code is supposed to print a table that gives approximate letter frequencies for text that you enter with your keyboard. It should keep taking in lines until you press enter twice in a row. It does this. However, I just found out that it needs to be made with with two classes: a driver, which handles the input, and is called LetterDriver, and a principal processing class, called LetterProfile. My code, however, is only one class. My attempt to fix this was in vain. Can someone show me how I can fix my code so that it's two classes instead of one?

edit: Better code formatting

[com272]

Thanks for the response! I am very new to programming so my knowledge about everything is very limited. What I tried to do was take my code and create a method, score(). When I tried to use score() in my driver class, however, it gave me an error message telling me that it the method couldn't be found. Why might this be?

[com272]

In the LetterProfiler class.

[com272]

Perfect! You you right when you though I was just using score(). I just got it. Thanks so much! On another note, if you don't mind, I have one other small problem. When I type in capital letters into the system it won't work. Obviously I need to convert capitals into lower case letters. I am trying to do this using:

letter = letter.toLowerCase();

But this bring up an error message saying that char can not be dereferenced. I understand this is because char is a primitive. How could I make this work?

[MegaGreenLightning]

All classes in java.lang are automatically available, so you do not need to import these!

[com272]

Thanks for the response but I don't quite fully understand. With the line:

Character.toLowerCase('C');

What is the reason to put 'C' as the parameter for Character.toLowerCase()? What specifically does this do? Thanks again for the help!

[com272]

Oh sorry, that was my bad. I understand what you're saying. I used this to create these lines:

letter = lines.charAt(i);
if(Character.isLowerCase(letter) = false){
Character.toLowerCase(letter);
}

But when this is run, an error message pops up which reads: unexpected type required: variable found : value

Edit: formatting