Is
00, 000, or 000...
an integer in Java? Or is it an octal? If is it an octal is
001 or 0005
an octal?
Asked
Active
Viewed 4,851 times
5
-
2The linked question is about C/C++, not Java! Please reopen it. – johnchen902 Jun 04 '14 at 07:53
-
@johnchen902 I actually thought the same, but it looks like the [third answer](http://stackoverflow.com/a/12276570/2670792) is about Java. – Christian Tapia Jun 04 '14 at 07:54
-
1@Christian That didn't make it a duplicate. I didn't even scroll down that much. – johnchen902 Jun 04 '14 at 07:56
3 Answers
7
All are integers, but...
1 is decimal
0 is decimal
01 is octal
00 is octal
From Java Language Specification (emphasis mine):
Note that octal numerals always consist of two or more digits; 0 is always considered to be a decimal numeral - not that it matters much in practice, for the numerals 0, 00, and 0x0 all represent exactly the same integer value.
Christian Tapia
- 33,620
- 7
- 56
- 73
4
Number literal representation examples in Java will give you the answer:
int decimal = 100;
int octal = 0144;
int hex = 0x64;
int binary = 0b1100100;
So 00, 000 and 0000 are all octal(base-8) integers.
Juvanis
- 25,802
- 5
- 69
- 87
1
Directly from specification
An octal numeral consists of an ASCII digit 0 followed by one or more of the ASCII digits 0 through 7 and can represent a positive, zero, or negative integer.
You can check 0 though 7
Suresh Atta
- 120,458
- 37
- 198
- 307