Question about ArrayList

I'm trying to make a sort of theoretical MP3 player for an assignment, using the ArrayList class

Basically, I have a "Song" class that defines attributes of songs, including Title, Artist, Duration, and most importantly, Filesize. I have to use an ArrayList to store the songs, but this music player has a size limit

My question is, how do I get the ArrayList to specify a capacity limit, and then check the 'filesize' variable when determining how full it is? I'm really only familiar with the trimToSize method, which isn't what I need. If the limit is 15, I don't want 15 song objects, I want it to fill up based on the object's 'filesize' attribute

I hope that made any sort of sense

How does a file's size relate to the capacity of an ArrayList? An ArrayList holds references to objects, not the full contents of an object.

Are you asking how to limit the number of objects that can be placed in an ArrayList based on the size of the objects?


What are you trying to do?

I have to create an ArrayList that can hold Song objects. Each Song object has an attribute, fileSize, that says, well, how big the file is. This ArrayList can hold any number of songs, but only as long as the total fileSize of those songs doesn't exceed a certain amount (To be set by me, say 15)

I'm not sure how to get that to work

One way would be to wrap the ArrayList in a class and have an add() method that would look at the filesize of items being added and control the number allowed based on total filesize so far.