Our collection will hold a bunch of Melon:

public class Melon {

  private final String type;
  private final int weight;

  // constructor, getters, equals(), 
  // hashCode(), toString() omitted for brevity
}

Let's assume the following collection (ArrayList) throughout our examples to demonstrate how we can remove elements from it that match a given predicate:

List<Melon> melons = new ArrayList<>();
melons.add(new Melon("Apollo", 3000));
melons.add(new Melon("Jade Dew", 3500));
melons.add(new Melon("Cantaloupe", 1500));
melons.add(new Melon("Gac", 1600));
melons.add(new Melon("Hami", 1400));

Let's take a look at the different solutions given in the following sections.