Date validation using Java Regular Expressions

The date can be validated using the java.util.regex.Pattern.matches() method. This method matches the regular expression for the date and the given input date and returns true if they match and false otherwise.

A program that demonstrates this is given as follows:

Example

 Live Demo

public class Demo {
   public static void main(String args[]) {
      String date = "15-11-2018";
      String regex = "\d{1,2}-\d{1,2}-\d{4}";
      System.out.println("The date is: " + date);
      System.out.println("Is the above date valid? " + date.matches(regex));
   }
}

Output

The date is: 15-11-2018
Is the above date valid? True

Now let us understand the above program.

The date is printed. The Pattern.matches() method matches the regular expression for the date and the given input date and the result is printed. A code snippet which demonstrates this is as follows:

String date = "15-11-2018";
String regex = "\d{1,2}-\d{1,2}-\d{4}";

System.out.println("The date is: " + date);
System.out.println("Is the above date valid? " + date.matches(regex));