[Why] java any logical reason behind this concpet

Question

as
int a=3/0;
// output is arithmetic exception: why not infinity;
double b=3.0/0;
//output is infinity: why not arithmetic exception;

Answer 1

The simple answer is a double is a floating point number and complies with the IEEE 754 standard for floating point arithmetic, which states:

>The value of this constant is the result of dividing a positive {or negative} number by zero.