- Regular Expressions
- Harness Program
- java.util.regex package
- Pattern class
- Regular Expression Syntax
- Regular Expression : Predefined character classes
- Match any Character with .
- Match any digit with \d
- Match any word character \w
- Regular Expression : Character classes
- Range Of Characters
- Negated Character classes
- Quantifiers
- Greedy quantifiers
- Reluctant quantifiers
- Possessive quantifiers
- Greedy, Reluctant, and Possessive Quantifiers
- ? : once or not at all
- * : Match zero or more times
- + : Match one or more times
- Logical operators
- Matching one of sub expressions
- Capturing Groups
- Naming a capturing group
- Backreferences
- Boundary Matchers
- Start(^) and End($) of the Line
- Word boundary
- Escape sequence
- regular expression to validate java variable name
- Exploring Pattern class
- Match input against pattern
- Compiling regular expression
- Creating a Pattern with Flags
- Pattern.CANON_EQ
- Pattern.CASE_INSENSITIVE
- Pattern.COMMENTS
- Pattern.DOTALL
- Pattern.LITERAL
- Pattern.MULTILINE
- Pattern.UNICODE_CASE
- Split the input based on the pattern
- Get regular expression from which this pattern was compiled
- Matcher class
- How to create Matcher instance
- matches() : Match entire input sequence
- lookingAt(): Match input sequence
- find() : Find all the matches in the input
- Get the Matched sequence boundaries
- replaceAll() : Replace all the matched sequence with this sequence
- replaceFirst : Replace the first matched sequence
- matches vs find
- Lookahead and Lookbehind: Split a string by keeping delimiters
- Split a string by the pipe symbol
This blog is primarily focus on Java fundamentals and the libraries built on top of Java programming language. Most of the post are example oriented, hope you have fun in reading my blog....:)
Friday 7 November 2014
Regular Expressions
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