Java在java.math包中提供的API类BigDecimal,用来对超过16位有效位的数进行精确的运算。双精度浮点型变量double可以处理16位有效数,但在实际应用中,可能需要对更大或者更小的数进行运算和处理。一般情况下,对于那些不需要准确计算精度的数字,我们可以直接使用Float和Double处理,但是Double.valueOf(
System.out.println("乘法用value结果 result3:"+result3); System.out.println("乘法用string结果 result32:"+result32); System.out.println("绝对值用value结果 result4:"+result4); System.out.println("绝对值用string结果 result42:"+result42); System.out.println("除法用value结果 result5:"+result5...
Returns the size of an ulp, a unit in the last place, of this BigDecimal. BigIntegerunscaledValue() Returns a BigInteger whose value is the unscaled value of this BigDecimal. static BigDecimalvalueOf(double val) Translates a double into a BigDecimal, using the double's canonical string represent...
* {@linkplain #BigDecimal(String) string constructor}, only the * numerical value of this {@code BigDecimal} will necessarily be * recovered; the representation of the new {@code BigDecimal} * may have a different scale. In particular, if this * {@code BigDecimal} has a negative scale, ...
Immutable,arbitrary precision signed decimal numbers. A BigDecimal consists of an arbitrary precision integer unscaled value and a 32-bit integer scale. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is ...
我们使用BigDecimal.valueOf(0.01)时,方法首先通过Double.toString(0.01)将传入的double类型数值转换为其标准字符串表示形式,在通过new BigDecimal(Strin val)去构建BigDecimal。其源码如下: public static BigDecimal valueOf(double val) { // Reminder: a zero double returns '0.0', so we cannot fastpath ...
publicstaticvoidmain(String[] args){// 报异常:Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.System.out.println(BigDecimal.valueOf(121).divide(BigDecimal.valueOf(3))); ...
* @return {@code true} if and only if the specified {@code Object} is a * {@code BigDecimal} whose value and scale are equal to this * {@code BigDecimal}'s. * @see #compareTo(java.math.BigDecimal) * @see #hashCode */ @Override public boolean equals(Object x) { if (!(x ...
Java documentation forjava.math.BigDecimal.valueOf(long). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
原因有两点：BigDecimal 里面还是有很多隐蔽的坑的BigDecimal 没有提供金额的单位BigDecimal 中的五个容易踩的坑①new BigDecimal() 还是 BigDecimal#valueOf()？先看下面这段代码：BigDecimal bd1 = new BigDecimal(0.01);BigDecimal bd2 = BigDecimal.valueOf(0.01);System.out.println("bd1 = " + bd1);System...