不可能

long xValue = someValue;
long yValue = someValue;
long otherTolalValue = (long)(xValue - yValue);

3行均不能产生java.lang.ClassCastException

neither of the 3 lines can produce java.lang.ClassCastException

假设someValue是Double，

Assuming someValues is Double,

Double someValue = 0.0;

会出现编译错误：类型不匹配：无法将Double转换为long