java 对double的 有趣处理 （j基 p30）

很智慧，颇有数学中无穷分析的意味
真爱死java了
public class FunnyNumbers {
public static void main(String[] args) {
double largeNum = (int)Math.exp(4000.0);
//int 不能除0
//Exception in thread "main" java.lang.ArithmeticException: / by zer oat FunnyNumbers.main(FunnyNumbers.java:4)
double posDivZero = 10.0/0.0;
double negDivZero = -10.0/0.0;
double zeroDivZero = 0.0/0.0;

p(largeNum);
p(posDivZero);
p(negDivZero);
p(zeroDivZero);

double x = largeNum + posDivZero;
double y = largeNum + negDivZero;
double z = largeNum + zeroDivZero;

p("x= " + x);
p("y= " + y);
p("z= " + z);
}
public static void p (Object o) {
System.out.println(o);
}
}
/*
2.147483647E9
Infinity
-Infinity
NaN
x= Infinity
y= -Infinity
z= NaN
*/