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The character classes in Java regular expression is defined using the square brackets "[ ]", this subexpression matches a single character from the specified or, set of possible characters. For example the regular expression [abc] matches a single character a or, b or, c.The union variant of the character class allows you to match a character from one of the specified ranges i.e. the expression [a-z[0-9]] matches a single character which is either a small alphabet (a-z) or a digit (0-9).Example Live Demoimport java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample1 { public static void main(String[] args) { ... Read More
The character classes in Java regular expression is defined using the square brackets "[ ]", this subexpression matches a single character from the specified or, set of possible characters. For example, the regular expression [abc] matches a single character a or, b or, c.The range variant of the character class allows you to use a range of characters i.e the expression [a-z] matches a single character from the alphabets a to z and the expression [^A-Z] matches a character which is not a capital letter.Example 1 Live Demoimport java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexExample1 { public static void ... Read More
The character classes in Java regular expression is defined using the square brackets "[ ]", this subexpression matches a single character from the specified or, set of possible characters.For example the regular expression [abc] matches a single character a or, b or, c. Similarly, "[a-z]" matches a single character from a to z.Similarly, the negation variant of the character class is defined as "[^ ]" (with ^ within the square braces), it matches a single character which is not in the specified or set of possible characters.For example the regular expression [^abc] matches a single character except a or, b ... Read More
To match/search a input data with multiple lines −Get the input string.Split it into an array of tokens by passing "\r?" as parameter to the split method.Compile the required regular expression using the compile() method of the pattern class.Retrieve the matcher object using the matcher() method.In the for loop find matches in the each element (new line) of the array using the find() method.Reset the input of the matcher to the next element of the array using the reset() method.Example Live Demoimport java.util.regex.Matcher; import java.util.regex.Pattern; public class MatchingText{ public static void main(String[] args) { String input = ... Read More
$ operatorOperator is used to define variables in php. For example, message. Such variables can contain any type of value like int, string, etc.$$ operator$$ is a special operator that contains the name of another variable and can be used to access the value of that variable.ExampleFollowing the example, shows the usage of '′vs′$' operators. Live Demo PHP Example Outputmessage Welcome to Tutorialspoint
The split() method of the String class accepts a regular expression, splits the current input text into tokens and returns them as a string array.Example Live Demoimport java.util.Scanner; public class Example{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter input text: "); String input = sc.nextLine(); String[] strArray = input.split("\d"); for (int i=0; i
'AND' Logical operator'AND' operator is a logical AND operator but has low precedence to = operator.'&&' Logical operator'&&' is also a logical AND operator but has high precedence to = operator.ExampleFollowing the example, shows the difference of 'AND' vs '&&' operators. Live Demo PHP Example Output$result = $x AND $y bool(true) $result = $x && $y bool(false)
Named capturing groups allows you to reference the groups by names. Java started supporting captured groups since SE7.Example Live Demoimport java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReplaceAll{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter input text: "); String input = sc.nextLine(); String regex = "(?[\d]{2})-(?[\d]{5})-(?[\d]{6})"; //Creating a pattern object Pattern pattern = Pattern.compile(regex); //Matching the compiled pattern in the String Matcher matcher = pattern.matcher(input); while (matcher.find()) { ... Read More
'|' Bitwise OR operator'|' operator is a bitwise OR operator and is used to set the bit to 1 if any of the corresponding bit is 1.'||' Logical Or operator'||' is a logical Or operator and works on complete operands as whole.ExampleFollowing example, shows usage of '|' vs '||' operators. Live Demo PHP Example Output$x | $y = 3 $x || $y = 1
Once you compile the required regular expression and retrieved the matcher object by passing the input string as a parameter to the matcher() method.You can replace all the matched parts of the input string with another str4ing using the replaceAll() method of the Matcher class.This method accepts a string (replacement string) and replaces all the matches in the input string with it and returns the result.Example 1 Live Demoimport java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReplaceAll{ public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter input text: "); ... Read More