Count number of items with property

Question

I have list List where Custom is like

class Custom{
    public int id;
    public String name;
}

How to

Answer 1

This can now be done easily with Java 8 streams — no extra libraries required.

List list = /*...*/;
long numMatches = list.stream()
                      .filter(c -> "Tom".equals(c.name))
                      .count();