숫자값이 너무 커서 int로는 커버가 안될 때

System.out.println((int) Math.floor(4.4497083717E10));
System.out.println((long) Math.floor(4.4497083717E10));
System.out.println((long) 4.4497083717E10);
 
2147483647   -- due to an overflow
44497083717
44497083717

a = 21413134219
b = 19241313142
 
sum = (long) (Double.parseDouble(a) + Double.parseDouble(b));
 
sum = 40654447361

참고사이트

1. Floor function to float and double values

2. Formatting troubles: How to power to number?