It's not clear from what you posted.

A Comparator is a way of parsing the elements...

If that whole list you posted is a single String, you'll need to separate it into individual items.

The output you've posted differs from the input in more than order - the colon after the initial number is missing. To get this result you need more than a sort.

If you could be more precise about what your input is and what you require for output, it would be possible to give you more specific answers.

Questions are the important thing, answers are less important. Learning to ask a good question is the heart of intelligence. Learning the answer---well, answers are for students. Questions are for thinkers...
R. Schank