当用浮点数除以零时，是否可以强制Java引发错误? [英] Can I force java to throw an error when dividing by zero with floating point numbers?

问题描述

我编写了一个模拟器，该模拟器具有一些碰撞检测代码，并且在检测到碰撞时对每个对象进行了大量的数学运算.

I wrote a simulator that has some collision detection code and does a good bit of math on each object when it detects collisions.

如果这两个对象位于完全相同的位置，或者在极少数其他情况下，我会得到NaN(不是数字)作为它们沿直线某处的位置，我想知道在哪里.通常，如果我对整数执行这些操作，程序将崩溃，但是由于+和-infinity是浮点规范的一部分，因此可以使用.

If these two objects are at the exact same location or in some rare other cases, I'm getting NaN (not a number) as their location somewhere along the line and I'd like to know where. Normally, the program would crash if I did these operations on integers but because + and - infinity are part of the floating point spec, it is allowed.

所以，沿着这条线的某个地方，我取负数的平方根或除以零.

So, somewhere along the line I'm taking a square root of a negative number or dividing by zero.

无论如何，我是否可以使程序在导致此问题的操作上自动崩溃，以便缩小其范围?

Is there anyway I can make my program automatically crash on the operations that cause this so I can narrow it down some?

推荐答案

除非您在除法之前测试数字并自己提出例外，否则我认为您不能提出除以零的例外.

I don't think you can raise a divide by zero exception unless you test the numbers before the division and raise the exception yourself.

浮点数的问题是，标准要求结果必须为NaN(而不是数字)浮点数.而且我所知道的所有JVM和编译器都遵循这方面的标准.

The problem with floats is, that the standard requires that the result gets a NaN (Not a Number) float. And all JVMs and compilers that I am aware off follow the standard in this respect.

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