ListString energyList = new ArrayList; 把energyList 的string值转化成Bigdecimal类型并计算所有值累加值累加值保留两位小数

List energyList = new ArrayList<>(); // Assuming energyList is populated with strings

BigDecimal sum = BigDecimal.ZERO; for (String energy : energyList) { BigDecimal energyValue = new BigDecimal(energy); sum = sum.add(energyValue); }

sum = sum.setScale(2, RoundingMode.HALF_UP); System.out.println(sum); // Prints the sum with two decimal places