public class LongDivision{
public static void main(String[] args){
final long MICROS_PER_DAY = 24*60*60*1000*1000;
final long MILLIS_PER_DAY = 24*60*60*1000;
System.out.println(MICROS_PER_DAY / MILLIS_PER_DAY);
}
}
Solution:
显示：
5 因为 24*60*60*1000*1000的结果是int类型，再把这个结果转换成long的，但是24*60*60*1000*1000的结果已经溢出，不能用int表示。
TID：
When working with large numbers, watch out for overflow-it's a silent killer.
Correctly:
public class LongDivision{
public static void main(String[] args){
final long MICROS_PER_DAY = 24
L*60*60*1000*1000;
final long MILLIS_PER_DAY = 24
L*60*60*1000;
System.out.println(MICROS_PER_DAY / MILLIS_PER_DAY);
}
}
