Collections removeAll method

Question

I would like to know if something like below is possible,

list.removeAll(namesToRemove)

I hope the context is understandable.

The

Answer 1

Java 8:

list.removeIf(obj -> namesToRemove.contains(obj.getName()));

Java 7 and older:

Iterator iter = list.iterator();
while (iter.hasNext())
    if (namesToRemove.contains(iter.next().getName()))
        iter.remove();

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Note that both alternatives have quadratic complexity. You can make it linear by doing

Set namesToRemoveSet = new HashSet<>(namesToRemove);

before the snippets, and use namesToRemoveSet instead of namesToRemove.