Hi I have to match a pattern like below
{digit 0-1 or A}:{digit 0-1 or A}:{digit 0-1 or A}|{digit 0-1 or A}:{digit 0-1 or A}:{digit 0-1 or A}|{digit 0-1 or A}:{digit 0-1 or A}:{digit 0-1 or A}
I am using the following code -
String accMatrixPattern = "\\d{1,1}|[A]:\\d{1,1}|[A]:\\d{1,1}|[A]|[A]:\\d{1,1}|[A]";
String accMatrx = "1:A:1|0:1:1|0:1:1";
If I am using only "\\d{1,1}|[A]";
it is working but not combined.
Please suggest How to match Regular Expression
Thanks
If you're trying to match just 0, 1 or A in each position, you can use:
String accMatrixPattern = "[01A]:[01A]:[01A]\\|[01A]:[01A]:[01A]\\|[01A]:[01A]:[01A]";
If you want to take values, -1, 0, 1, A:
String accMatrixPattern = "([01A]|-1):([01A]|-1):([01A]|-1)\\|([01A]|-1):([01A]|-1):([01A]|-1)\\|([01A]|-1):([01A]|-1):([01A]|-1)";
String regex = "[01A]:[01A]:[01A](\\|[01A]:[01A]:[01A]){2}";
This matches one character (either a 0 or a 1 or the letter A), followed by a colon, followed by another character like the first, followed by a colon, followed by a third character like the first.
Then it takes a | character (note that it's escaped), followed by the same thing again but twice.
The problem is that the | on the whole string, so, with brackets added to indicate how grouping will happen, your regex would look something like this:
"(\\d{1,1})|([A]:\\d{1,1})|([A]:\\d{1,1})|([A])|([A]:\\d{1,1})|([A])"So it would match a string consisting of only 1 or A:0 or A:1 or ...
So you should add some brackets to make it process it correctly.
The {1,1} is redundant, you can just use \\d.
A doesn't have to be inside [].
You need to escape the | if you're talking about the literal character.
"(\\d|A):(\\d|A):(\\d|A)\|(\\d|A):(\\d|A):(\\d|A)\|(\\d|A):(\\d|A):(\\d|A)"
You can now use some {} to cancel out the redundancy.
"(\\d|A):(\\d|A)(:(\\d|A)\|(\\d|A):(\\d|A)){2}"
For only digits 0-1, using [01A] (as suggested in the other answers) is probably better.
"[01A]:[01A](:[01A]\|[01A]:[01A]){2}"
[01A]:[01A]:[01A](?:\\|[01A]:[01A]:[01A]){2}
?: to specify this is a non capturing group
