Java Regex – Matching Character Classes
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Following are various examples of matching character classes using regular expression in java.
| Sr.No | Construct & Matches |
|---|---|
| 1 | [abc]
a, b, or c (simple class). |
| 2 | [^abc]
Any character except a, b, or c (negation). |
| 3 | [a-zA-Z]
a through z or A through Z, inclusive (range). |
| 4 | [a-d[m-p]]
a through d, or m through p: [a-dm-p] (union). |
| 5 | [a-z&&[def]]
d, e, or f (intersection). |
| 6 | [a-z&&[^bc]]
a through z, except for b and c: [ad-z] (subtraction) |
| 7 | [a-z&&[^m-p]]
a through z, and not m through p: [a-lq-z](subtraction). |
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