从并行foreach循环中获取多个值

import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.RecursiveTask;

public class ParallelForEachExample {

    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

        ForkJoinPool forkJoinPool = new ForkJoinPool();
        SumTask sumTask = new SumTask(numbers);
        int sum = forkJoinPool.invoke(sumTask);

        System.out.println("Sum: " + sum);
    }

    static class SumTask extends RecursiveTask<Integer> {
        private List<Integer> numbers;

        public SumTask(List<Integer> numbers) {
            this.numbers = numbers;
        }

        @Override
        protected Integer compute() {
            if (numbers.size() <= 2) {
                return numbers.stream().mapToInt(Integer::intValue).sum();
            } else {
                int middle = numbers.size() / 2;
                SumTask leftTask = new SumTask(numbers.subList(0, middle));
                SumTask rightTask = new SumTask(numbers.subList(middle, numbers.size()));

                leftTask.fork();
                rightTask.fork();

                int leftSum = leftTask.join();
                int rightSum = rightTask.join();

                return leftSum + rightSum;
            }
        }
    }
}