Java数值问题汇总

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final BigDecimal b1 =new BigDecimal(0.48); final BigDecimal b2 = BigDecimal.valueOf(0.48); // 0.479999999999999982236431605997495353221893310546875 System.out.println(b1); // 0.48 System.out.println(b2);

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public static BigDecimal valueOf(double val) { // Reminder: a zero double returns '0.0', so we cannot fastpath // to use the constant ZERO. This might be important enough to // justify a factory approach, a cache, or a few private // constants, later. return new BigDecimal(Double.toString(val)); }