Java Division错误 [英] Java Division error

问题描述

我有以下变量：

int first = 0;
int end = 0;

在公共类中声明。

在方法中：

double diff = end / first;
double finaldiff = 1 - diff;

<$ c $上的结束变量c> System.out.println 是 527 ，第一个是 480 。

The end variable on System.out.println is 527, the first is 480.

为什么差异的答案是 1 ？它应该是 1.097916667 ，我以为使用 double 会让我计算成小数？

Why is the answer for diff coming out as 1? It should be 1.097916667, I thought using a double would enable me to calculate into decimals?

推荐答案

划分两个 int s会得到一个 int ，然后隐式转换为 double 。在divison之前将一个投射到 double ：

Dividing two ints will get you an int, which is then implicitly converted to double. Cast one to a double before the divison:

double diff = (double)end / first;

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