import java.util.stream.Stream;

public class StatefulStreamExample {

    public static void main(String[] args) {
        String[] words = {"apple", "banana", "cherry", "date"};

        StateHolder stateHolder = new StateHolder();

        long count = Stream.of(words)
                .map(word -> stateHolder.addAndReturn(word))
                .count();

        System.out.println("Total characters: " + stateHolder.getTotalChars());
    }

    static class StateHolder {
        private int totalChars = 0;

        public String addAndReturn(String word) {
            totalChars += word.length();
            return word;
        }

        public int getTotalChars() {
            return totalChars;
        }
    }
}