Category: 14. Java Regex

Following are various examples of matching characters using regular expression in java. Sr.No Construct & Matches 1 xThe character x 2 \\The backslash character 3 \0nThe character with octal value 0n (0 ≤ n ≤ 7) 4 \0nnThe character with octal value 0nn (0 ≤ n ≤ 7) 5 \0mnnThe character with octal value 0mnn…

Introduction The java.util.regex.PatternSyntaxException class represents a unchecked exception thrown to indicate a syntax error in a regular-expression pattern. Class declaration Following is the declaration for java.util.regex.PatternSyntaxException class − Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career. Constructors Sr.No Method & Description 1 PatternSyntaxException(String desc, String regex, int index)Constructs a…

Introduction The java.util.regex.Matcher class acts as an engine that performs match operations on a character sequence by interpreting a Pattern. Class declaration Following is the declaration for java.util.regex.Matcher class − Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career. Class methods Sr.No Method & Description 1 Matcher appendReplacement(StringBuffer sb, String…

Introduction The java.util.regex.Pattern class represents a compiled representation of a regular expression. Class declaration Following is the declaration for java.util.regex.Pattern class − Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career. Field Following are the fields for java.util.regex.Duration class − Class methods Sr.No Method & Description 1 static Pattern compile(String regex)Compiles the…

Introduction The java.util.regex.MatchResult interface represents the result of a match operation. This interface contains query methods used to determine the results of a match against a regular expression. The match boundaries, groups and group boundaries can be seen but not modified through a MatchResult. Interface declaration Following is the declaration for java.util.regex.MatchResult interface − Learn Java in-depth with real-world projects through…

Capturing groups are a way to treat multiple characters as a single unit. They are created by placing the characters to be grouped inside a set of parentheses. For example, the regular expression (dog) creates a single group containing the letters “d”, “o”, and “g”. Capturing groups are numbered by counting their opening parentheses from…

Java provides the java.util.regex package for pattern matching with regular expressions. Java regular expressions are very similar to the Perl programming language and very easy to learn. A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings, using a specialized syntax held in a…