Surprised that this wasn't already posted. I'm making a for loop, and its worked before but for some reason I can't find the length of a boolean array.
for(int z = 0; z < keyIsFound.length(); z++){
//do something
}
Asked
Active
Viewed 2.0k times
9
Razib
- 10,965
- 11
- 53
- 80
Muhammad Shahab
- 119
- 1
- 1
- 4
-
8`keyIsFound.length` - no () – Eran Dec 09 '15 at 13:13
-
2You should visit this [link](http://stackoverflow.com/questions/1965500/length-and-length-in-java) for more information. – Madushan Perera Dec 09 '15 at 13:15
4 Answers
11
For arrays, their lengths are fixed when we create them.
If you want to get the length of any array, use .length.
Ankit Shubham
- 2,989
- 2
- 36
- 61
5
.length = to get the length for arrays
.length() = to get the length of Strings
Ruelos Joel
- 2,209
- 3
- 19
- 33
3
For array the length is a property - not a method. You have to write keyIsFound.length. Array is a fixed sized data structure when you create an array like -
int[] nums = new int[10];
You actually fixed it length too.
Razib
- 10,965
- 11
- 53
- 80
0
length is a field, not a method.
Use something like for (int z = 0; keyIsFound != null && z < keyIsFound.length; ++z){ instead: i.e. drop the parentheses. Note my null check, which you should consider incorporating either with the for loop, or, better still, in a containing if.
(I like to use ++z rather than z++ as I'm an old-fashioned cat).
Bathsheba
- 231,907
- 34
- 361
- 483
-
1I'd think it would be enough to check for `keyIsFound != null` at the very start, in a separate `if` clause. – glglgl Dec 09 '15 at 13:22
-
Very true, I could play the "compiler will optimise out card", but then I open myself to ridicule over using ++z. – Bathsheba Dec 09 '15 at 13:23