Arrays.parallelPrefix

public static void main(String[] args) {
    int[] ints = new int[]{3,2,3,4,5};
    Arrays.parallelPrefix(ints, new IntBinaryOperator() {
        @Override
        public int applyAsInt(int left, int right) {
            // 自己写规则
            return left*right;
        }
    });

    System.out.println(Arrays.asList(ints).toString());
}