浅谈Java double 相乘的结果偏差小问题

public class TestDouble { public static void main(String[] args) { double d =538.8; System.out.println(d*100); }

public class TestDouble {   public static void main(String[] args) {    double d =538.8;      BigDecimal a1 = new BigDecimal(Double.toString(d));    BigDecimal b1 = new BigDecimal(Double.toString(100));     BigDecimal result = a1.multiply(b1);// 相乘结果    System.out.println(result);    BigDecimal one = new BigDecimal("1");    double a = result.divide(one,2,BigDecimal.ROUND_HALF_UP).doubleValue();//保留1位数    System.out.println(a);   } }