Web Reference: Java - Regular Expressions Part 3: Pattern and Matcher Classes Example 1: Finding All Matches Pattern pattern = Pattern.compile ("\\d+"); Matcher matcher = pattern.matcher ("Order123, Item456"); while (matcher.find ()) { System.out.println ("Match: " + matcher.group ()); } // Match: 123 // Match: 456 Example 2: Using group () The backslash character ('\') serves to introduce escaped constructs, as defined in the table above, as well as to quote characters that otherwise would be interpreted as unescaped constructs. Thus the expression \\ matches a single backslash and \{matches a left brace. It is an error to use a backslash prior to any alphabetic character that does n... What is a Regular Expression? A regular expression is a sequence of characters that forms a search pattern. When you search for data in a text, you can use this search pattern to describe what you are searching for. A regular expression can be a single character, or a more complicated pattern.
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