6. Duration.java:

Emma and her colleagues plan to have lunch outside today. Right now, it is 11:34. Emmas boss wants her back before 13:15 for a very important meeting. In order to help Emma to know if she has enough time, develop a program and tell the time duration from now to the meeting in the format of HH:MM. Your program should support the input of any given pair of start/end time via the keyboard.

Use loop to avoid invalid inputs. Ensure the hour input and the minute input is in the right range [0..23] and [0..59] respectively. When start time is later than end time, ask the user to choose reenter both times; otherwise, quit the execution without giving any wrong information in the display. Please be aware of the correct use of next, nextLine, and nextInt.