java8 lam表達式 BigDecimal 相加

BigDecimal oneAmountAllTeam = combatTeamEntities.stream().map(CombatTeamEntity::getActivityAmountOne).reduce(BigDecimal::add).get();

// 查找list 中滿足條件的對象返回

Optional<MemberRsp> first = memberRsps.stream().filter(e -> e.getMemberId().intValue() == entity.getMemberId().intValue()).findFirst();
MemberRsp memberRsp = first.get();