比较 Java 中的 BigDecimal 和 int
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Comparing BigDecimal and int in Java
提问by HighBit
Which one is the best way of comparing a BigDecimal and an int in Java : coverting the BigDecimal to int or converting int to BigDecimal ?
在 Java 中比较 BigDecimal 和 int 的最佳方法是哪一种：将 BigDecimal 转换为 int 或将 int 转换为 BigDecimal？
采纳答案by Péter T?r?k
If you expect the BigDecimalvalue to be really big (i.e. outside the range of intvalues, which is -231to 231-1) and/or to contain decimal digits, or simply want to play safe, you should convert the intto BigDecimalto avoid overflow / truncation errors.
如果你期待BigDecimal值是非常大的（即范围以外的int值，这是-2 31到2 31-1）和/或包含十进制数字，或只是想为了稳妥起见，你应该转换int到BigDecimal以避免溢出/截断错误。
Otherwise, if performance is a really big issue (which is rare), it mightbe better the other way around.
否则，如果性能是一个非常大的问题（这种情况很少见），那么反过来可能会更好。
回答by Bober02
One reason not to convert int to BigDecimal is the fact that you would be creating a new object, therefore you are really throwing garbage on your heap to perform equality. Also, primitive equality would be faster than the one on the actual BigInteger object as well.
不将 int 转换为 BigDecimal 的一个原因是您将创建一个新对象，因此您实际上是在堆上扔垃圾以执行相等。此外，原始相等也会比实际 BigInteger 对象上的相等更快。
回答by Taymon
You want to convert the intto a BigDecimal.
您想将 转换int为BigDecimal.
This is because you won't always be able to convert a BigDecimal to an int; you'll lose any information after the decimal point and the value of the BigDecimal might be outside the range of an int.
这是因为您并不总是能够将 BigDecimal 转换为 int；您将丢失小数点后的任何信息，并且 BigDecimal 的值可能超出 int 的范围。
回答by Sirko
As BigDecimalextends the range of intyou will have to convert the intinto BigDecimalto be sure they can be compared, anyhow.
随着BigDecimal范围的扩大，int您必须将 转换int为BigDecimal以确保它们可以进行比较，无论如何。
