How to I represent a changing time schedule in java?

See more:

Java

So I'm building an application where a user can enter various songs for a festival.
The programme will take its priority as well as length and try and fit it into the schedule.
I'm wondering how I go about representing the priority, name and length of the song and making sure there is time left in the schedule.

What I have tried:

I've tried using a hashtable, an array and an arraylist but I'm still stuck as to how to represent time in my programme.