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 Sample 1. Count elements of a collection matching a Predicate using Apache Commons IterableUtils

List<String> list = new ArrayList();
list.add("New York");
list.add("New Jersey");

// <String> long org.apache.commons.collections4.IterableUtils.countMatches(Iterable<String> input, Predicate<? super String> predicate)
System.out.println(IterableUtils.countMatches(list, p->((String)p).startsWith("N")));

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