如何在Java中实现无穷大？ [英] How to implement infinity in Java?

问题描述

Java对于每个数字数据类型来说，Java有什么可以表示无穷大吗？它如何实现，以便我可以使用数学运算？

例如

  int myInf = infinity; //但是完成
 myInf + 5; //返回无穷大
 myInf *（ -  1）; //返回负无穷大
  

我尝试使用非常大的数字，但是我想要一个正确的

解决方案

double 支持Infinity

  double inf = Double.POSITIVE_INFINITY; 
 System.out.println（inf + 5）; 
 System.out.println（inf-inf）; //与Double.NaN 
相同System.out.println（inf * -1）; //与Double.NEGATIVE_INFINITY 
  

打印

 无限
 NaN 
 -Infinity 
  

note： Infinity - Infinity 是不是数字。

Does Java have anything to represent infinity for every numerical data type? How is it implemented such that I can do mathematical operations with it?

E.g.

int myInf = infinity; //However it is done
myInf + 5; //returns infinity
myInf*(-1); //returns negative infinity

I have tried using very large numbers, but I want a proper, easy solution.

解决方案

double supports Infinity

double inf = Double.POSITIVE_INFINITY;
System.out.println(inf + 5);
System.out.println(inf - inf); // same as Double.NaN
System.out.println(inf * -1); // same as Double.NEGATIVE_INFINITY

prints

Infinity
NaN
-Infinity

note: Infinity - Infinity is Not A Number.

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