Introduction to regular expression

  1. Regular Expression concept came in java in 1.4 version.
  2. Regular Expression: It is an expression to represent a group of String objects according to a particular pattern.
  3. Mostly used to validate user input in html forms.
  4. Pattern matching application i.e find in a notpad program.
  5. While designing translators example in compiler.
  6. Digital Circuit development uses regular repressions.
  7. Communication protocol development example TCP/UDP.

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