Date Validation in Java

DateValidationMethod.java


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package extract_filename;

import java.text.ParsePosition;
import java.text.SimpleDateFormat;


public class DateValidationMethod
 {
        static boolean isLegalDate(String s)
    {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // set the date format here

            sdf.setLenient(false); // this will make the parse method throw ParseException when the given input string is not in the specified format.

            return sdf.parse(s, new ParsePosition(0)) != null;
      }
        
        public static void main(String args[])
        {
            String date_pattern="2004-06-1";
            boolean flag=isLegalDate(date_pattern);
            //System.out.println("flag::"+flag);
            if(flag==true)
            {
                System.out.println("Valid Date");
            }
            else
            {
                System.out.println("Not Valid Date");
            }
            System.out.println("isLegalDate::"+isLegalDate(date_pattern)); //isLegalDate
             }
}


Output:
Valid Date
isLegalDate::true

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