我刚刚写了一个小方法来计算手机短信的页数。我没有选择使用Math.ceil
,老实说,它看起来很丑陋。
这是我的代码:
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String message = "today we stumbled upon a huge performance leak while optimizing a raycasting algorithm. Much to our surprise, the Math.floor() method took almost half of the calculation time: 3 floor operations took the same amount of time as one trilinear interpolation. Since we could not belive that the floor-method could produce such a enourmous overhead, we wrote a small test program that reproduce";
System.out.printf("COunt is %d ",(int)messagePageCount(message));
}
public static double messagePageCount(String message){
if(message.trim().isEmpty() || message.trim().length() == 0){
return 0;
} else{
if(message.length() <= 160){
return 1;
} else {
return Math.ceil((double)message.length()/153);
}
}
}
我不太喜欢这段代码,我正在寻找一种更优雅的方法来做到这一点。有了这个,我期望 3 而不是 3.0000000。有任何想法吗?
Use Math.ceil()
并将结果转换为 int:
- 这仍然比使用 abs() 避免双打要快。
- 使用负数时结果是正确的,因为 -0.999 将向上舍入为 0
例子:
(int) Math.ceil((double)divident / divisor);
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