Below is a method that simulates the Visual Basic isDate() method and is configurable so you can set what you consider are the valid date formats.
I modifed this and added the "Jan|Feb|Mar|Apr..." and "JAN|FEB|MAR|APR|..." to the regex so that the method now validates the formats I needed to check.
I am now implementing this in my application.
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import java.util.ArrayList;
import java.util.regex.Pattern;
public class IsDateTestClass {
public static boolean isDate(CharSequence date) {
// some regular expression
String time = "(\\s(([01]?\\d)|(2[0123]))[:](([012345]\\d)|(60))"
+ "[:](([012345]\\d)|(60)))?"; // with a space before, zero or one time
// no check for leap years (Schaltjahr)
// and 31.02.2006 will also be correct
String day = "(([12]\\d)|(3[01])|(0?[1-9]))"; // 01 up to 31
String month = "((1[012])|(0\\d))"; // 01 up to 12
String year = "\\d{4}";
// define here all date format
ArrayList
patterns.add(Pattern.compile(day + "[-.]" + month + "[-.]" + year + time));
patterns.add(Pattern.compile(year + "-" + month + "-" + day + time));
// here you can add more date formats if you want
// check dates
for (Pattern p : patterns)
if (p.matcher(date).matches())
return true;
return false;
}
public static void main(String[] args) {
ArrayList
dates.add("05.10.1981"); // swiss date format (dd.MM.yyyy)
dates.add("05-10-1981");
dates.add("07-09-2006 23:00:33");
dates.add("2006-09-07 23:01:24");
dates.add("2003-08-30");
dates.add("2003-30-30"); // false
dates.add("some text"); // false
for (String d : dates)
System.out.println(isDate(d));
}
}
