Java bigdecimal类-阿里云

Java常用类（5）--不可变的任意精度BigInteger、BigDecimal类文章目录BigInteger类BigDecimal类BigInteger类Integer类作为int的包装类，能存储的最大整型值为2^31-1，Long类也是有限的，最大为2^63-1。如果要表示再大的整数，不管是基本数据类型还是他们的包装类都无能为力。java.math包的BigInteger可以...

Java BigDecimal类 BigDecimal可以表示一个任意大小且精度完全准确的浮点数。看了源码，BigDecimal主要是以一个BigInteger和int成员变量组成的intVal表示数字部分，scale表示小数的位数。BigDecimal d1 = new BigDecimal("123.45"); BigDecim...

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Java基础系列9：BigInteger类和BigDecimal类一 BigInteger类当我们碰到需要处理一个很大的数字时，这时候肯定没法使用int和long。当然我们可以使用String来接收大数字，然后再采用拆分的方式来计算，不过这种方式很麻烦。因此在Java中为了解决这种问题，提供了BigInteger类。BigInteger类表示是大整数类...

关于Java的BigDecimal类处理小数点的问题 double C = a + b + c;return new BigDecimal(C).setScale(2, BigDecimal.ROUND_HALF_UP);上面这个输出结果没问题。但是如果不创建C，直接return new BigDecimal(a+b+c).setScale(2, Bi...

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