3. 如果是float或double类型转Bigdecimal,不要使用new BigDecimal()转, 使用valueOf()方法 或new BigDecimal("")转成string,否则有可能出现精度问题。 《Effective Java》这本书里说过: 如果需要精确的答案,请避免使用float和double 因为float和double执行的是二进制浮点运算,二进制有些情况下不能准确的表示一个小数...
publicstatic 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.returnnew BigDecimal(Double.toString(val...
BigDecimal类中使用最多的还是提供的进行四则运算的方法,如下: public BigDecimal add(BigDecimal value) // 加法运算public BigDecimal subtract(BigDecimal value) // 减法运算public BigDecimal multiply(BigDecimal value) // 乘法运算public BigDecimal divide(BigDecimal value) // 触发运算 接下来我们就来通过一些案例...
* @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 inst...
3. 静态方法 valueOf(double val) 内部实现,仍是将 double 类型转为 String 类型; 这通常是将 double(或float)转化为 BigDecimal 的首选方法; 测试代码如下: packagecom.qiyuan.util;importjava.math.BigDecimal;publicclassorderCode {publicstaticvoidmain(String[] args) {doubled1 = 0.10334;doubled2 = 1234....
valueOf(long val) long値をスケールが0のBigDecimalに変換します。 static BigDecimal valueOf(long unscaledVal, int scale) longのスケールなしの値とintのスケールをBigDecimalに変換します。 クラス java.lang. Numberから継承されるメソッド byteValue, shortValue クラス java.lang.Objectから継...
* the resulting string is generated as if the value were * converted to a numerically equal value with zero scale and as * if all the trailing zeros of the zero scale value were present * in the result. * * The entire string is prefixed by a minus sign character '-' ...
大概意思就是,equals方法和compareTo并不一样,equals方法会比较两部分内容,分别是值(value)和精度(scale) 对应的代码如下:  所以,我们以上代码定义出来的两个BigDecimal对象(bigDecimal4和bigDecimal5)的精度是不一样的,所以使用equals比较的结果就是false了。
The results of this constructor can be somewhat unpredictable. One might assume that writing new BigDecimal(0.1) in Java creates a BigDecimal which is exactly equal to 0.1 (an unscaled value of 1, with a scale of 1), but it is actually equal to 0.100000000000000005551115123125782702118158340454101562...
Java documentation forjava.math.BigDecimal.intValue(). 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. ...