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The java.util.regex.Matcher class represents an engine for performing various matching operations. This class has no constructor and can be usedmatches()
is created by the method of the class java.util.regex.Pattern/to obtain an object of this class.
The Matcher classusePattern()The method accepts a Pattern object representing the new regular expression pattern and uses it to find matches.
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class UsePatternExample {}} public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter input text: "); String input = sc.nextLine(); String regex = "[#%&*]"; //Create a pattern object Pattern pattern = Pattern.compile(regex); //Create a Matcher object Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } //search pattern used System.out.println("The are "+count+" special characters [# % & *] in the given text"); //to create an accepting5 t 6character pattern Pattern newPattern = Pattern.compile("\\A(?=\\w{6,15}\\z)"); //Switch to new mode matcher = matcher.usePattern(newPattern); if(matcher.find()) { System.out.println("Given input contain 6 to 15 characters}); } else { System.out.println("Given input doesn't contain 6 to 15 characters}); } } }
Output Result
Enter input text: #*mypassword& The are 3 special characters [# % & *] in the given text !!mypassword! Given input doesn't contain 6 to 15 characters