Mastering Regular Expressions in Java/

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Pattern Matching Using Quantifiers

Pattern Matching Using Quantifiers

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Matching specific characters

We use [] square brackets for matching specific characters using regular expressions. We use brackets to find a set of characters. See examples below:

  • [ABC]: Character class representing either A, B, or C.
  • [^ABC]: Character class with negation, any character other than A, B, or C.
  • [0-9]: Any numeric character, either of 0, 1, 2 … 8, or 9.
  • [^0-9]: Any character other than 0, 1, 2 … 8, or 9.

Quantifiers

We can use quantifiers to capture group patterns. Below are the ...