转java 用bigdecimal实现 =IFERROR((AK3/AN3-1)/9*0.1+(AL3/AN3-1)/9*0.15+(AM3/AN3-1)/9*0.5+(AO3/AP3-1)/9*0.25,"-")

以下是使用BigDecimal实现的Java代码：

import java.math.BigDecimal;

public class Calculation {
    
    public static String calculate(BigDecimal ak, BigDecimal an, BigDecimal al, BigDecimal am, BigDecimal ao, BigDecimal ap) {
        try {
            BigDecimal result = new BigDecimal(0);
            BigDecimal nine = new BigDecimal(9);
            if (an.compareTo(BigDecimal.ZERO) == 0) {
                return "-";
            }
            BigDecimal akDivideAn = ak.divide(an, 10, BigDecimal.ROUND_HALF_UP);
            BigDecimal alDivideAn = al.divide(an, 10, BigDecimal.ROUND_HALF_UP);
            BigDecimal amDivideAn = am.divide(an, 10, BigDecimal.ROUND_HALF_UP);
            BigDecimal aoDivideAp = ao.divide(ap, 10, BigDecimal.ROUND_HALF_UP);
            BigDecimal first = akDivideAn.subtract(BigDecimal.ONE).divide(nine, 10, BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("0.1"));
            BigDecimal second = alDivideAn.subtract(BigDecimal.ONE).divide(nine, 10, BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("0.15"));
            BigDecimal third = amDivideAn.subtract(BigDecimal.ONE).divide(nine, 10, BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("0.5"));
            BigDecimal fourth = aoDivideAp.subtract(BigDecimal.ONE).divide(nine, 10, BigDecimal.ROUND_HALF_UP).multiply(new BigDecimal("0.25"));
            result = first.add(second).add(third).add(fourth);
            return result.toString();
        } catch (Exception e) {
            return "-";
        }
    }

    public static void main(String[] args) {
        BigDecimal ak = new BigDecimal("1.23");
        BigDecimal an = new BigDecimal("4.56");
        BigDecimal al = new BigDecimal("7.89");
        BigDecimal am = new BigDecimal("10.12");
        BigDecimal ao = new BigDecimal("13.45");
        BigDecimal ap = new BigDecimal("16.78");
        String result = calculate(ak, an, al, am, ao, ap);
        System.out.println(result);
    }
}

其中，`calculate`方法接收6个参数，分别是AK3、AN3、AL3、AM3、AO3和AP3的值，使用`BigDecimal`进行精确计算，并返回结果字符串。如果计算过程中出现异常，则返回"-"。在`main`方法中，我们可以设置这些参数的值，并调用`calculate`方法进行计算。