sum(T[] array, T zero, BinaryOperator<T> accumulator)

package ch.claude_martin.foo;

import java.util.Arrays;
import java.util.function.BinaryOperator;

public class SomeClass {
    static class Binary {

        public static Binary ZERO = new Binary(false);
        public static Binary ONE = new Binary(true);
        private final boolean value;

        private Binary(boolean value) {
            this.value = value;
        }

        public static Binary of(boolean b) {
            return b ? ONE : ZERO;
        }

        public Binary add(Binary b) {
            return new Binary(b.get() || value);
        }

        public boolean get() {
            return value;
        }

        @Override
        public String toString() {
            return value ? "1" : "0";
        }
    }

    public static void main(String[] args) {
        Binary[] numbers = new Binary[] { Binary.ZERO, Binary.ZERO, Binary.ONE, Binary.ZERO };
        System.out.println(sum(numbers, Binary.ZERO, Binary::add));
    }

    public static <T> T sum(T[] array, T zero, BinaryOperator<T> accumulator) {
        return Arrays.stream(array).reduce(zero, accumulator);
    }
}