Java Examples - Check Date Format

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Problem Description:

How to check check whether date is in proper format or not?

Solution:

Following example demonstrates how to check whether the date is in a proper format or not using matches method of String class.

public class Main {
   public static void main(String[] argv) {
      boolean isDate = false;
      String date1 = "8-05-1988";
      String date2 = "08/04/1987" ;
      String datePattern = "\\d{1,2}-\\d{1,2}-\\d{4}";
      isDate = date1.matches(datePattern);
      System.out.println("Date :"+ date1+": matches with
      the this date Pattern:"+datePattern+"Ans:"+isDate);
      isDate = date2.matches(datePattern);
      System.out.println("Date :"+ date2+": matches with 
      the this date Pattern:"+datePattern+"Ans:"+isDate);
   }
}

Result:

The above code sample will produce the following result.

Date :8-05-1988: matches with the this date Pattern:
\d{1,2}-\d{1,2}-\d{4}Ans:true
Date :08/04/1987: matches with the this date Pattern:
\d{1,2}-\d{1,2}-\d{4}Ans:false


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