For fun, I took java classes. many times I argue with teachers

that the programs I wrote were right or wrong and shall I get full credits. because they didn't belive those a few line command could do same thing as 60 or more lines do. I always ask them actually run them to see the results. those teachers have PhD and once worked for big company and still consulting for big companys. when they asked me how I did it, I said I am lazy and want to do it straight forward and simplest.