java - int 除以 int 得到 BigDecimal

Question

是否可以将两个整数相除以生成 BigDecimal？我正在尝试优化我的代码。如果我可以减少我声明新 BigDecimal 的次数，它应该会显着加快我的流程。到目前为止，我最了解的如何减少计算是：

BigDecimal tester = new BigDecimal("103993")
       .divide(new BigDecimal("33102"), 2000, BigDecimal.ROUND_DOWN);

我想知道是否可以做这样的事情：

int example1 = 103993;
int example2 = 33102;

BigDecimal example3 = example1/example2;

或类似的规定。我唯一的目标是加快执行时间。

score 5 · Accepted Answer

There is a slight improvement that you can do that uses the BigDecimal's internal cache by using its valueOf method:

BigDecimal.valueOf(example1).divide(
    BigDecimal.valueOf(example2), 2000, BigDecimal.ROUND_DOWN);

score 2 · Accepted Answer

2

In a word, no. By the time you've divided one int by the other, you've already lost information.

于 2013-03-02T17:29:33.647 回答

2 回答 2