// onjava/FilledCollection.java // (c)2016 MindView LLC: see Copyright.txt // We make no guarantees that this code is fit for any purpose. // Visit http://mindviewinc.com/Books/OnJava/ for more book information. // A Collection filled with data using a generator object package onjava; import java.util.*; import java.util.function.*; public class FilledCollection extends ArrayList { public FilledCollection(Supplier gen, int quantity) { for(int i = 0; i < quantity; i++) add(gen.get()); } // A generic convenience method: public static FilledCollection list(Supplier gen, int quantity) { return new FilledCollection<>(gen, quantity); } }