Works great, except I have to edit the source file to change the input because I could never get ... Java and the swing framework, provide example code for handling a text field with a single ...

To complete the use case, you must convert this one-character String into a single Java char with the charAt(0) method. Notice that the code has a check for the newline character, as this will be ...

(At runtime, the \n combination prints as a single newline character in the output, which is why 12 characters are printed, not 13.) This is actually an interesting contrast between Python and Java.