I'm trying to teach myself Java in preparation for a CS class next semester. I've read a few chapters of an introductory Java book. I thought I write a program for fun, where it would take a bunch of times (5 to be exact) and average them. The format would be in min:sec (eg 1:41). My question is that, is there a procedure or method in Java that can check if the ":" is a member of the input? Also are there similar "car" or...