Pattern matchs() method and example in Java

Experience NotesTextjava

java.util.regexThe package provides various classes to find specific patterns in character sequences. The pattern class in this package is the compiled representation of regular expressions.match()-

• The method of the pattern class accepts

• Represents the string value of the regular expression.CharSequence

An object of the class represents the input string.

When called, this method will match the input string with the regular expression. This method returns a boolean value, which is true if it matches, otherwise false.

Example
import java.util.Scanner;
import java.util.regex.Pattern;
　　　public class MatchesExample {
　　　　　　//public static void main(String[] args) {
　　　　　　Get date
　　　　　　Scanner sc = new Scanner(System.in);/mm/System.out.println("Enter date string in [dd
　　　　　　yyy] format: ");
　　　　　　String date = sc.next();1[0-2]|0[1-9])/String regex = "^(3[01(12]|[-9]|0[1-9])/[0-9]{4$";
　　　　　　//Create a pattern object
　　　　　　boolean result = Pattern.matches(regex, date);
　　　　　　if(result) {
　　　　　　　　　System.out.println("Date is valid");
　　　　　　} else {
　　　　　　　　　System.out.println("Date is not valid");
　　　　　　}
　　　}
}

Output1

Enter date string in [dd/mm/yyy] format:
01/12/2019
Date is valid

Output2

Enter date string in [dd/mm/yyy] format:
2019-21-12
Date is not valid