The comment is the only thing in a monospace font. It's a criticism, and a valid one, of your choice of programming font. Nobody in their rightest of minds programs in Times New Roman. I'm convinced you must be trolling us.
I also use proportional fonts for Java to make the code look like it's taken from an algorithms textbook. Also, idiomatic Java as produced by IDEs usually doesn't align variables, so the code looks OK as long as the space characters themselves all are of the same width.
The C++ code I work with usually has more strenuous alignments which are only possible to get right in monospace fonts.