Math.ceil返回0.0？

Question

所以我正在开发一个Java项目,我输入:

double totalPages;
int amountKits = 2;
totalPages = amountKits / 3;
System.out.println("Total pages before ceil: " + totalPages);
totalPages = Math.ceil(totalPages);
System.out.println("Amount of Kits: " + amountKits);
System.out.println("Total Pages: " + totalPages);

这是结果:

Total pages before ceil: 0.0
Amount of Kits: 2
Total Pages: 0.0

有谁知道为什么会这样？(对不起,我是个菜鸟,我知道)

Answer 1

因为你在计算2 / 3整数运算.

尝试:

totalPages = amountKits / 3.0;

代替.