新税法缴税基于map和递归的实现

static double fax(int salary) {

    Map<Integer,Function<Integer,Double>> amap =new LinkedHashMap<>();

    amap.put(5000,i->0d);

    amap.put(8000,i->0.03*(i-5000));

    amap.put(17000,i->0.07*(i-8000));

    amap.put(30000,i->0.10*(i-17000));

    amap.put(40000,i->0.05*(i-30000));

    amap.put(60000,i->0.05*(i-40000));

    amap.put(85000,i->0.05*(i-60000));

    amap.put(Integer.MAX_VALUE,i->0.05*(i-85000));

    Double sum =0d;

    for (Map.Entry<Integer, Function<Integer, Double>> integerFunctionEntry : amap.entrySet()) {

        sum +=integerFunctionEntry.getValue().apply(salary);

        if(salary<=integerFunctionEntry.getKey()) break;

    }

    return  sum;

}

public static void main(String[] args) {

    int[] yourSalarys={3500,5000,7500,8000,17000,18000,30000,31000,60000};

    Arrays.stream(yourSalarys).forEach(o->{

        double fax = fax(o);

        System.out.println("Salary before fax----->" + o );

        System.out.println("fax------------------->" + fax );

        System.out.println("Salary after fax------>" + (o-fax));

        System.out.println("--------------------------");

    });

}