将double转换为Int，四舍五入 [英] Convert double to Int, rounded down

问题描述

如何执行以下操作将double值转换为int:

How to convert a double value to int doing the following:

Double If x = 4.97542. Convert to int x = 4.

Double If x = 4.23544. Convert to int x = 4.

也就是说，答案总是四舍五入.

That is, the answer is always rounding down.

推荐答案

如果您明确地广播 double到int，则小数部分将被截断.例如:

If you explicitly cast double to int, the decimal part will be truncated. For example:

int x = (int) 4.97542;   //gives 4 only
int x = (int) 4.23544;   //gives 4 only

此外，如果希望返回double值，也可以使用Math.floor()方法对值进行舍入.

Moreover, you may also use Math.floor() method to round values in case you want double value in return.

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